RVPH Reviva Pharmaceuticals Holdings Inc

EXPLANATORY NOTE

 

As previously reported by Reviva Pharmaceuticals Holdings, Inc. (together with its consolidated subsidiary, the “Company”, “we” or “us”), the audit committee (the “audit committee”) of the board of directors of the Company, after meeting with management, concluded that the Company’s previously issued financial statements for the fiscal year ended December 31, 2022 included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2022, the interim financial statements for the quarterly period ended September 30, 2022 included in its Quarterly Report on Form 10-Q, and each of the interim financial statements for the quarterly periods in fiscal 2023 included in its Quarterly Reports on Form 10-Q (cumulatively, the “Restatement Periods”) should be restated to correct historical errors related principally to the timing of recognition of the Company’s estimated accrual of certain research and development expenses. Such restatement was reflected and included within the Company's annual financial statements for the fiscal year ended December 31, 2023 included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which was filed with the Securities and Exchange Commission (the “SEC”) on April 15, 2024.

 

Please refer to the Explanatory Note to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which was filed with the SEC on April 15, 2024, for more information regarding the restatement. For a more detailed discussion of the correction of historical errors in the Restatement Periods, including for the three and six months ended June 30, 2023, refer to Notes 2 and 10 to the consolidated financial statements of the Company included in Part II, Item 8 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which was filed with the SEC on April 15, 2024.

 

 

PART I. FINANCIAL INFORMATION

 

Item 1. Financial Statements (Unaudited).

 

REVIVA PHARMACEUTICALS HOLDINGS, INC.

 

CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)

June 30, 2024 and December 31, 2023

 

 

The accompanying notes are an integral part of these condensed consolidated financial statements.

 

 

REVIVA PHARMACEUTICALS HOLDINGS, INC.

 

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

For the Three and Six Months Ended June 30, 2024 and 2023

 

 

The accompanying notes are an integral part of these condensed consolidated financial statements.

 

 

REVIVA PHARMACEUTICALS HOLDINGS, INC.

 

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY (DEFICIT) (UNAUDITED)

 

For the Three and Six Months Ended June 30, 2024

 

 

 

The accompanying notes are an integral part of these condensed consolidated financial statements.

 

 

REVIVA PHARMACEUTICALS HOLDINGS, INC.

 

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS’ EQUITY (DEFICIT) (UNAUDITED)

 

For the Three and Six Months Ended June 30, 2023

 

 

 

The accompanying notes are an integral part of these condensed consolidated financial statements.

 

 

REVIVA PHARMACEUTICALS HOLDINGS, INC.

 

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

 

For the Six Months Ended June 30, 2024 and 2023

 

 

The accompanying notes are an integral part of these condensed consolidated financial statements.

 

 

REVIVA PHARMACEUTICALS HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

 

 

1.  ORGANIZATION AND NATURE OF OPERATIONS

 

On December 14, 2020, Reviva Pharmaceuticals Holdings, Inc. (the “Company”), a Delaware corporation and the successor by re-domiciliation to Tenzing Acquisition Corp. (“Tenzing”), a British Virgin Islands exempted company, Tenzing Merger Subsidiary Inc., a Delaware corporation and wholly-owned subsidiary of Tenzing (“Merger Sub”), and Reviva Pharmaceuticals, Inc., a Delaware corporation (together with its consolidated subsidiary), consummated a business combination (the “Business Combination”) through the merger of Merger Sub with and into Reviva Pharmaceuticals, Inc. (the "Merger"), in accordance with the Agreement and Plan of Merger, dated as of July 20, 2020 (the “Merger Agreement”), by and among Tenzing, Merger Sub, Reviva Pharmaceuticals, Inc., and the other parties thereto. Pursuant to the Merger Agreement, at the effective time of the Merger, Merger Sub merged with and into Reviva Pharmaceuticals, Inc., with Reviva Pharmaceuticals, Inc. as the surviving company in the Merger and, after giving effect to such Merger, Reviva Pharmaceuticals, Inc. becoming a wholly-owned subsidiary of Reviva Pharmaceuticals Holdings, Inc. In these notes to the unaudited condensed consolidated financial statements, unless otherwise specified or the context indicates otherwise, references to the “Company,” “Reviva,” “we,” “us” and “our” refer to Reviva Pharmaceuticals Holdings, Inc. and its consolidated subsidiary.

 

Reviva Pharmaceuticals, Inc. was originally incorporated in the state of Delaware and commenced operations on May 1, 2006 and its Indian subsidiary, Reviva Pharmaceuticals India Pvt. Ltd. was incorporated in 2014. The Company is a late-stage pharmaceutical company developing new therapies that seek to address unmet medical needs in the areas of central nervous system (CNS), inflammatory and cardiometabolic diseases.

 

2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION

 

Basis of presentation

 

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 8 of Regulation S-X. Certain footnotes and other financial information normally required by accounting principles generally accepted in the United States of America, or GAAP, have been condensed or omitted in accordance with such rules and regulations. In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as our annual consolidated financial statements and notes thereto and include all adjustments, consisting of normal recurring items, considered necessary for the fair presentation. The operating results for the three and six months ended June 30, 2024 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2024.

 

The unaudited condensed consolidated balance sheet as of December 31, 2023, has been derived from our audited financial statements at that date but does not include all disclosures and financial information required by GAAP for complete financial statements. The information included in the quarterly report on Form 10-Q should be read in conjunction with our consolidated financial statements and notes thereto for the year ended December 31, 2023, which were included in our annual report on Form 10-K, as filed with the Securities and Exchange Commission on April 15, 2024.

 

Reclassifications

 

Certain amounts in the prior year’s consolidated financial statements, as of December 31, 2023 have been reclassified to conform to the current period's presentation. This involved disclosing separately, prepaid clinical trial costs from the prepaid expenses and other current assets balance, which were previously disclosed in the aggregate. This reclassification had no effect on the Company’s loss from operations, net loss, or net loss per share.

 

F-6

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Principles of consolidation

 

The accompanying condensed consolidated financial statements include the accounts of the Reviva Pharmaceuticals Holdings, Inc. and its wholly owned subsidiary Reviva Pharmaceuticals, India Pvt Ltd. The Company’s subsidiary’s functional currency is the U.S. dollar. The Company recognizes a foreign currency gain or loss each reporting period, on translation of its foreign subsidiary's financial information on consolidation. Any such foreign currency gain or loss is recognized as part of other expense, net, on the condensed consolidated statement of operations. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America. All transactions and balances between the parent and its subsidiary have been eliminated in consolidation.

 

Previously-disclosed restatement of previously reported interim condensed consolidated quarterly financial statements

 

The interim consolidated financial statements include corrections to the three and six months ended June 30, 2023, which corrections were previously presented in the audited consolidated financial statements and notes thereto, including specifically Note 10, “Quarterly Financial Data (Unaudited and Restated)”, for the fiscal year ended December 31, 2023, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as filed with the SEC on April 15, 2024 (sometimes hereinafter referred to as the “2023 Form 10-K”).

 

As previously reported in Item 4.02(a) of the Company’s Current Report on Form 8-K as filed with the SEC on April 15, 2024, and in the Company’s 2023 Form 10-K, on April 12, 2024, the audit committee (the “audit committee”) of the board of directors of the Company, after meeting with management, concluded that the Company’s previously issued financial statements for the fiscal year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, the interim financial statements for the quarterly period ended September 30, 2022 included in its Quarterly Report on Form 10-Q, and each of the interim financial statements for the quarterly periods in fiscal 2023 included in its Quarterly Reports on Form 10-Q (cumulatively, the “Restatement Periods”) should be restated to correct historical errors related principally to the timing of recognition of the Company’s estimated accrual of certain research and development expenses.

 

The need for the restatement arose out of the results of certain financial analysis the Company performed in the course of preparing its fiscal year-end 2023 consolidated financial statements. Principally, the Company completed a detailed lookback analysis to compare certain estimated accrued clinical trial expenses, specifically investigator fees, from one contract research organization to its actual clinical trial expenses that were incurred for the respective periods for that contract research organization during the Restatement Periods based on review of historical invoices. In the course of its analysis of the actual information gathered through the lookback process, the Company detected differences between the estimated accrued amounts of those clinical trial expenses and the actual expenses recorded due primarily to the Company’s failure to properly review and evaluate expenses incurred in those clinical trial contracts resulting in the Company not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received. In addition, the Company determined that an effective process for evaluating the completeness of the research and development expense accrual for investigator fees and related costs, for that contract research organization, was necessary. This included estimated patient site visits not yet reported, average site visit costs and average delay in site invoicing. This provides the Company with an effective estimate of the costs incurred as there can be a lag between receiving an invoice for the services provided from that contract research organization. Management and the audit committee of the Company’s board of directors concluded that, in the ordinary course of closing its financial books and records, the Company previously excluded certain clinical trial expenses and associated accruals from the appropriate periods as required under applicable accounting guidelines. Therefore, the Company misstated research and development expenses, and accrued clinical expenses for the three and six months ended June 30, 2023.

 

F-7

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As previously disclosed, the Company misstated research and development expenses and associated accrued liabilities during the Restatement Periods. Also as previously disclosed, the Company principally attributes the errors to a material weakness in its internal control activities due to a failure in the design and implementation of its controls to review clinical trial expenses, including the evaluation of the terms of clinical trial contracts. Specifically, the Company failed to properly review and evaluate progress of expenses incurred in clinical trial contracts resulting in the Company not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received. These material weaknesses were previously disclosed in Item II, Part 9A of the Company’s 2023 Form 10-K, and are disclosed in Part I, Item 4 of this Quarterly Report on Form 10-Q. The Company has commenced procedures to remediate the material weaknesses. However, these material weaknesses will not be considered remediated until the applicable remedial actions have been fully implemented and the Company has concluded that these controls are operating effectively for a sufficient period of time.

 

These condensed consolidated financial statements and the corresponding discussion included in Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, are reflective of the restatement adjustments for the three and six months ended June 30, 2023, as previously presented in Note 10 to the Company’s consolidated financial statements included in the 2023 Form 10-K.

 

As previously disclosed in Note 10, “Quarterly Financial Data (Unaudited and Restated)”, to the Consolidated Financial Statements included in the Company’s 2023 Form 10-K, the restated line items of the consolidated statement operations for three and six months ended June 30, 2023 are as follows:

 

		Originally Reported				Adjustment				Restated
		Three Months Ended June 30, 2023				Three Months Ended June 30, 2023				Three Months Ended June 30, 2023
Research and development		$	8,991,250			$	(734,914	)		$	8,256,336
Total operating expenses			12,070,551				(734,914	)			11,335,637
Loss from operations			(12,070,551	)			734,914				(11,335,637	)
Net loss			(12,442,862	)			734,914				(11,707,948	)
Basic and diluted		$	(0.55	)		$	0.03			$	(0.52	)

 

		Originally Reported				Adjustment				Restated
		Six Months Ended June 30, 2023				Six Months Ended June 30, 2023				Six Months Ended June 30, 2023
Research and development		$	14,226,249			$	(485,768	)		$	13,740,481
Total operating expenses			18,806,104				(485,768	)			18,320,336
Loss from operations			(18,806,104	)			485,768				(18,320,336	)
Net loss			(19,045,405	)			485,768				(18,559,637	)
Basic and diluted		$	(0.86	)		$	0.02			$	(0.84	)

 

While the adjustments changed net loss, and accrued expenses and other current liabilities line items in the condensed consolidated cash flow statement, they did not have an impact on total net cash used in operating activities. Further, there was no impact on cash flows from investing or cash flows from financing activities.

 

F-8

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As previously disclosed in Note 10, “Quarterly Financial Data (Unaudited and Restated)”, to the Consolidated Financial Statements included in the Company’s 2023 Form 10-K, the restated line items of the consolidated cash flow statement for the six months ended June 30, 2023 are as follows:

 

		Originally Reported				Adjustment				Restated
		Six Months Ended June 30, 2023				Six Months Ended June 30, 2023				Six Months Ended June 30, 2023
Cash flows from operating activities
Net loss		$	(19,045,405	)		$	485,768			$	(18,559,637	)
Adjustments to reconcile net loss to net cash used in operating activities
Changes in operating assets and liabilities
Accrued expenses and other current liabilities			3,817,989				(485,768	)			3,332,221
Net cash used in operating activities		$	(13,268,624	)		$	—			$	(13,268,624	)

 

Liquidity and going concern

 

The Company has incurred losses since inception and as of June 30, 2024 the Company had a working capital deficit of approximately $6.7 million, an accumulated deficit of $149.6 million and cash and cash equivalents on hand of approximately $6.2 million. The Company’s net loss for the three months ended June 30, 2024 and 2023, was approximately $7.9 million and $11.7 million, respectively. The Company's net loss for the for the six months ended June 30, 2024 and 2023, was approximately $15.3 million and $18.6 million, respectively. The Company expects to incur significant expenses and increased operating losses for the next several years. The Company expects its expenses to increase in connection with its ongoing activities to research, develop and commercialize its product candidates. The Company will need to generate significant revenues to achieve profitability, and it may never do so.

 

The Company’s current cash on hand is not sufficient to satisfy its operating cash needs for the 12 months from the filing of this Quarterly Report on Form 10-Q. The Company believes that it has adequate cash on hand to cover anticipated outlays into the third quarter of fiscal year 2024, but will need additional fundraising activities and cash on hand during the third quarter of fiscal year 2024. These conditions raise substantial doubt regarding the Company’s ability to continue as a going concern for a period of one year after the date the financial statements are issued. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our clinical development efforts. The Company will seek to fund its operations through public or private equity or debt financings or other sources, which may include collaborations with third parties. In May 2024 the Company raised capital through a registered financial offering (Note 4). Adequate additional financing may not be available to the Company on acceptable terms, or at all. Should the Company be unable to raise sufficient additional capital, the Company may be required to undertake cost-cutting measures including delaying or discontinuing certain clinical activities. These circumstances raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued.

 

Use of estimates

 

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of expenses during the reporting periods covered by the financial statements and accompanying notes. Significant areas requiring the use of management estimates include, but are not limited to, accounting for clinical trial costs, assumptions used to calculate the fair value of stock-based compensation, assumptions used to calculate the fair value of warrants, deferred taxes, and related valuation allowances. Actual results could differ materially from such estimates under different assumptions or circumstances.

 

F-9

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Concentration of credit risk and other risks and uncertainties

 

Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents. Substantially, all the Company’s cash and cash equivalents are held in demand deposit and money market funds at three financial institutions. Deposits in financial institutions may, from time to time, exceed federally insured limits. Amounts held in demand deposit in excess of federally insured limits, totaled $915,028 and $786,971 as of June 30, 2024 and December 31, 2023, respectively. The Company has not experienced any losses on its deposits of cash.

 

The Company is subject to all of the risks inherent in an early-stage company developing new pharmaceutical products. These risks include, but are not limited to, limited management resources, dependence upon medical acceptance of the product in development, regulatory approvals, successful clinical trials, availability and willingness of patients to participate in human trials, and competition in the pharmaceutical industry. The Company’s operating results may be materially affected by the foregoing factors.

 

Cash and cash equivalents

 

As of June 30, 2024, and December 31, 2023, the Company’s cash was maintained in demand deposit forms at three financial institutions. The Company considers any highly liquid investments, such as money market funds, with an original maturity of three months or less to be cash and cash equivalents.

 

The components of cash and cash equivalents were as follows:

 

		As of June 30, 2024				As of December 31, 2023
Cash on deposit		$	1,251,654			$	1,155,636
Money market funds (cash equivalents)			4,926,526				22,211,820
Cash and cash equivalents		$	6,178,180			$	23,367,456

 

Fair Value Measurements

 

Accounting Standards Codification ("ASC") 820, Fair Value Measurements ("ASC 820"), defines fair value, establishes a framework for measuring fair value in GAAP and expands disclosures about fair value measurements. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC 820 establishes a fair value hierarchy that distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3).

 

The three levels of the fair value hierarchy under ASC 820 are described below:

 

•

Level 1 - Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.

 

•

Level 2 - Directly or indirectly observable inputs as of the reporting date through correlation with market data, including quoted prices for similar assets and liabilities in active markets and quoted prices in markets that are not active. Level 2 also includes assets and liabilities that are valued using models or other pricing methodologies that do not require significant judgment since the input assumptions used in the models, such as interest rates and volatility factors, are corroborated by readily observable data from actively quoted markets for substantially the full term of the financial instrument.

 

•

Level 3 - Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions.

 

In determining the fair value of all warrants, excluding the private-placement warrants (see Note 7), the Company utilizes the Black-Scholes model using assumptions regarding volatility of the Company's common share price, expected term of the warrants, expected divided rate, and risk-free interest rates. In determining the fair value of the private placement warrants, the Company utilizes a Lattice model using assumptions regarding volatility implied by public warrant market price, expected term of the warrants, expected dividend rate, and risk-free interest rates. Due to their short maturities, the carrying amounts for cash and cash equivalents, prepaid clinical trial costs, prepaid expenses and other current assets, accounts payable, accrued clinical expenses, accrued compensation, short-term debt, and other accrued liabilities approximate their fair value.

 

F-10

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Short-term debt

 

In January 2024, the Company obtained financing for certain Director and Officer liability insurance policy premiums. The governing agreement assigns the lender a first priority lien on and security interest in the financed policies and any additional premium required in the financed policies.

 

The total premiums, taxes, and fees financed was $518,750, of which of which a principal of $415,000 was financed after accounting for the up-front payment made. The financing arrangement has an annual percentage interest rate of 7.99% and a term of 12 months, with payments, inclusive of interest, payable on a monthly basis.

 

New accounting pronouncements not yet adopted

 

In November 2023, the FASB issued Accounting Standards Update ("ASU") 2023-07, Segment Reporting (Topic 280), Improvements to Reportable Segment Disclosures. This Update improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this Update are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption of the amendments is permitted. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.

 

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740), Improvements to Income Tax Disclosures. This Update enhances the transparency and usefulness of income tax disclosures, particularly in the rate reconciliation table and disclosures about income taxes paid. The guidance also eliminates certain existing requirements related to uncertain tax positions and unrecognized deferred tax liabilities. The amendments in this Update are effective for annual periods beginning after December 15, 2024. Early adoption of the amendments is permitted for annual financial statements that have not yet been issued. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.

 

3.   LOSS PER SHARE

 

Basic and diluted net loss per share is computed by dividing the net loss for the period by the weighted average number of common stock outstanding during the period. Diluted loss per share includes potentially dilutive securities such as stock options, warrants to purchase common stock (excluding warrants that are exercisable for $0.0001 per warrant), and shares contingently issuable for earnout unless the result of inclusion would be anti-dilutive. These securities have been excluded from the calculation of diluted net loss per shares for the three and six months ended June 30, 2024 and 2023, because all such securities are anti-dilutive for all periods presented.

 

The components of basic and diluted net loss per share were as follows:

 

		Three Months Ended June 30,								Six Months Ended June 30,
		2024				2023 (as restated)				2024				2023 (as restated)
Numerator:
Net loss		$	(7,859,919	)		$	(11,707,948	)		$	(15,293,527	)		$	(18,559,637	)
Denominator:
Weighted-average common shares outstanding – basic and diluted			30,555,012				22,434,781				30,221,168				22,135,850
Net loss per share – basic and diluted		$	(0.26	)		$	(0.52	)		$	(0.51	)		$	(0.84	)

 

F-11

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The following table summarizes the Company’s potentially dilutive securities, in common share equivalents, which have been excluded from the calculation of dilutive loss per share as their effect would be anti-dilutive:

 

		Three Months Ended June 30,								Six Months Ended June 30,
		2024				2023				2024				2023
Shares issuable upon exercise of stock options			1,505,572				1,547,774				1,505,572				1,547,774
Shares issuable upon exercise of warrants to purchase common stock (excluding warrants that are exercisable for $0.0001 per warrant)			22,782,603				15,030,209				22,782,603				15,030,209
Shares contingently issuable for earnout			—				1,000,000				—				1,000,000
			24,288,175				17,577,983				24,288,175				17,577,983

 

The diluted loss per share computation equals basic loss per share for the three and six months ended June 30, 2024 and 2023 because the Company had a net loss and the impact of the assumed exercise of stock options, certain warrants, and shares contingently issuable for earnout would have been anti-dilutive.

 

4.   WARRANTS

 

Warrant activity during the six months ended June 30, 2024, was as follows:

 

		Number of Warrants				Weighted Average Exercise Price				Total Intrinsic Value				Weighted Average Remaining Contractual Life (in years)
Outstanding as of December 31, 2023			25,067,643			$	6.03			$	29,686,123				3.1
Issued			1,898,734				1.46				—				5.0
Outstanding as of June 30, 2024			26,966,377			$	5.52			$	2,519,822				2.8

 

May 2024 Registered Direct Offering

 

On May 28, 2024, the Company entered into a securities purchase agreement (the "Purchase Agreement") pursuant to which the Company sold, in a registered direct offering (the “Offering”) priced at the market under Nasdaq rules which closed on May 29, 2024, an aggregate of (i) 1,898,734 shares of its common stock, and (ii) warrants (the “Warrants”) exercisable for an aggregate of up to 1,898,734 shares of its common stock. The public offering price for each share of common stock and accompanying Warrant to purchase one share of common stock was $1.58. The Warrants have a term of 5 years and expire on May 29, 2029. The net proceeds to the Company from the Offering were $2.8 million, after deducting placement offering costs, agent fees and expenses and other offering expenses payable by the Company, of $0.4 million.

 

The Company evaluated the Warrants in accordance with the guidance at ASC 480, Distinguishing Liabilities from Equity and ASC 815-40, Derivatives and Hedging, and determined that they should be classified as equity instruments, with no recurring fair value measurement required. The Warrants are indexed to the Company’s common stock and are required to be settled through physical settlement or net share settlement, if exercised. Accordingly, the Warrants were recorded at their grant date fair value with no subsequent remeasurement.

 

The fair value of the Warrants was determined utilizing a Black-Scholes model, considering all relevant assumptions current at the date of issuance (i.e., Company stock price of $1.34, exercise price of $1.46, expected term of 5 years, volatility of 93%, risk-free interest rate of 4.6%, and expected dividend rate of 0%). Refer to Note 2 for further detail regarding how assumptions were determined. The grant date relative fair value of the Warrants was estimated to be approximately $1.1 million to additional paid-in capital in the condensed consolidated balance sheet as the warrants were determined to be equity classified, with the corresponding debit as an issuance cost of the related equity offering.

 

 

F-12

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Accounting for Warrant Modification

 

In connection with the Offering, on May 28, 2024, the Company entered into a warrant amendment agreement with the purchaser party to the Purchase Agreement, pursuant to which the Company agreed to amend the purchaser’s existing warrants to purchase 1,365,854 shares of common stock at an exercise price of $5.00 per share issued in November 2023 (the “Existing Warrants”) in consideration for such purchaser party’s participation and purchase of approximately $3.0 million of securities in the Offering and the payment of $0.2 million to (i) lower the exercise price of the Existing Warrants to $1.455 per share and (ii) amend the expiration date of the Existing Warrants to five years following the closing of the Offering, effective upon the closing of the Offering on May 29, 2024.

 

ASC Topic 480, Distinguishing Liabilities from Equity (“ASC 480”) and ASC Topic 815, Derivatives and Hedging ("ASC 815") require issuers to account for modifications or exchanges of freestanding equity-classified written call options (e.g., warrants) that remain equity classified after the modification or exchange based on the economic substance of the modification or exchange. Pursuant to ASC 480 and ASC 815, the Company accounts for modifications of equity-classified warrant agreements by recording any increase in fair value of the modified equity-classified warrant as an equity issuance cost that reduces additional paid-in capital.

 

The following assumptions were used to value the modification of the warrants immediately before the modification and immediately after the modification:

 

		Immediately before the modification				Immediately after the modification
Risk-free interest rate			4.70	%			4.60	%
Remaining expected term			4.5				5.0
Expected volatility			97.00	%			93.00	%
Stock price on valuation date		$	1.34			$	1.34
Exercise price		$	5.00			$	1.46
Expected dividend rate			—	%			—	%

 

5. STOCKHOLDERS' EQUITY (DEFICIT), STOCK OPTION PLANS, AND STOCK-BASED COMPENSATION

 

Our authorized capital stock consists of:

 

•

115,000,000 shares of common stock, par value $0.0001 per share; and

 

•

10,000,000 shares of preferred stock, par value $0.0001 per share.

 

As of June 30, 2024 there were 29,817,294 shares of our common stock outstanding, and no shares of preferred stock outstanding.

 

On May 28, 2024, the Company entered into the Purchase Agreement for the sale of shares of common stock and the warrants. Refer to Note 4, Warrants, for additional details.

 

As of June 30, 2024, the Company has shares of common stock reserved for future issuance as follows:

 

Shares underlying outstanding warrants			24,751,368
Shares reserved for future issuance under the 2020 Equity Incentive Plan			3,871,121
Stock options outstanding			1,505,572
Total common stock reserved for future issuance			30,128,061

 

2006 and 2020 Equity Incentive Plans

 

As of December 31, 2023, there were an aggregate of 1,004,263 shares of common stock available for issuance under the 2020 Equity Incentive Plan, subject to equitable adjustment in the event of stock splits and other capital changes (the “Share Reserve”). Following the December 31, 2023 balance sheet date, in accordance with the “evergreen” provision in our 2020 Equity Incentive Plan (the "Evergreen Provision"), an additional 2,791,856 shares were automatically made available for issuance on the first day of 2024, which represents 10% of the number of shares of the Company’s common stock outstanding on December 31, 2023. As a result, as of June 30, 2024, the Share Reserve available for future awards under the 2020 Equity Incentive Plan stood at 3,871,121 shares, after accounting for the above described 2024 Evergreen Increase and options forfeited in the first and second quarters of 2024.

 

F-13

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As of June 30, 2024, the Share Reserve related to previously issued and outstanding awards under the 2006 Equity Incentive Plan stood at 16,747. No new grants of awards are permitted under the 2006 Equity Incentive Plan.

 

Stock-Based Compensation Expense

 

The Company records stock-based compensation expense based on the fair value of stock options granted to employees, non-employee consultants and non-employee directors. During the three months ended June 30, 2024 and 2023, the Company recorded stock-based compensation expense of approximately $0.4 million and $2.6 million, respectively. During the six months ended June 30, 2024 and 2023, the Company recorded stock-based compensation expense of approximately $0.7 million and $2.7 million, respectively. As of June 30, 2024 the Company had unrecognized stock-based compensation expense of $2.4 million, which is expected to be recognized over a weighted-average period of 2.0 years.

 

There were no options granted during the six months ended June 30, 2024.

 

Activity under the stock plans for the six months ended June 30, 2024 is as follows:

 

		Shares Available for Grant				Number of Options Outstanding				Weighted Average Exercise price per share				Weighted Average Remaining Contractual Term in Years				Aggregate Intrinsic Value
Balance, December 31, 2023			1,004,263				1,580,574			$	6.51				9.11			$	300,969
Expired			75,002				(75,002	)			6.74
Evergreen plan increase			2,791,856
Balance, June 30, 2024			3,871,121				1,505,572			$	6.49				8.61			$	2,850
Options exercisable at June 30, 2024							915,196			$	6.80				8.42			$	2,492

 

For the three months ended June 30, 2024 and 2023, the amount of stock-based compensation expense included within research and development and general and administrative expenses was as follows:

 

		Three months ended, June 30,
		2024				2023
Research and development		$	184,883			$	992,473
General and administrative			174,110				1,628,346
Total stock-based compensation expense		$	358,993			$	2,620,819

 

For the six months ended June 30, 2024 and 2023, the amount of stock-based compensation expense included within research and development and general and administrative expenses was as follows:

 

		Six months ended, June 30,
		2024				2023
Research and development		$	379,779			$	1,033,867
General and administrative			348,289				1,638,479
Total stock-based compensation expense		$	728,068			$	2,672,346

  

6.   COMMITMENTS AND CONTINGENCIES

 

Clinical trials

 

Since 2010, the Company has entered into multiple clinical trial agreements with medical institutions in the United States, Europe and Asia for the purpose of enrolling patients into various clinical trials. The agreements are substantially similar by trial and include a detailed listing of the clinical trial services for which the Company will pay, how much will be paid for each service, a set-up charge (if any), Investigational Review Board fees, contractual term, and other provisions. The clinical trial services provided by each site generally include the screening of prospective patients and, for those patients to be enrolled in the study, administration of the Company’s investigation drug according to the trial protocol, any required hospitalization, ancillary medical supplies, and 2-week patient follow-up. Further, each agreement requires the Company to indemnify each respective clinical site against any and all liability, loss, or damage it may suffer as a result of third-party claims; the Company maintains product liability insurance in conjunction with this indemnification. The agreements may be terminated upon 30 days’ written notice, subject to conditions of paying all liabilities incurred through the date of termination. Additionally, with each screened patient, the Company incurs expense with other entities engaged to provide independent review of patient medical records.

 

F-14

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As part of the Company's agreement with one of its clinical research organizations, the Company is required to maintain a 7% upfront float for fees related to expenses incurred in clinical studies. When the float has depleted to 15% (i.e. 85% of the float has been used) the Company will receive an invoice to replenish the float up to 7% of the remaining estimated budget for the studies. As of December 31, 2023 and June 30, 2024, the Company had no remaining prepaid float balance.

 

Indemnification

 

From time to time, in its normal course of business, the Company may indemnify other parties, with whom it enters into contractual relationships, including lessors and parties to other transactions with the Company. The Company may agree to hold other parties harmless against specific losses, such as those that could arise from a breach of representation, covenant or third-party infringement claims. It may not be possible to determine the maximum potential amount of liability under such indemnification obligations due to the unique facts and circumstances that are likely to be involved in each particular claim and indemnification provision. Historically, there have been no such indemnification claims. The Company has also indemnified its directors and executive officers, to the extent legally permissible, against all liabilities reasonably incurred in connection with any action in which such individual may be involved by reason of such individual being or having been a director or executive officer.

 

Operating Leases

 

During the period covered by these condensed consolidated financial statements, the Company had two leases. The first was a twelve-month lease on its former corporate office located at 19925 Stevens Creek Blvd., Suite 100, Cupertino, CA 95014. The monthly lease payment was approximately $1,447 and the lease was renewed in February 2022 and again on February 1, 2023, for another 12-month term. This lease terminated on January 31, 2024. The second lease was for a new corporate office located at 10080 N. Wolfe Road, Suite SW3-200, Cupertino, CA 95014. The monthly lease payment was approximately $4,300 and the lease was entered into beginning December 1, 2023 for a 12-month term. The operating lease cost on these leases for the three months ended June 30, 2024 and 2023 was approximately $13,100 and $5,200, respectively. The operating lease cost on these leases for the six months ended June 30, 2024 and 2023 was approximately $24,300 and $10,200, respectively.

 

Litigation

 

The Company is not currently a party to any material legal proceedings and is not aware of any pending or threatened claims. From time to time, the Company may be subject to various legal proceedings and claims that arise in the ordinary course of its business activities.

 

F-15

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7. FAIR VALUE MEASUREMENTS

 

The following tables provide a summary of the assets and liabilities that are required to be measured at fair value on a recurring basis and where they are classified within the fair value hierarchy as of June 30, 2024 and December 31, 2023:

 

		June 30, 2024
		Level 1				Level 2				Level 3				Total
Assets:
Money market funds (cash equivalents)		$	4,929,526			$	—			$	—			$	4,929,526
Total assets measured and recorded at fair value		$	4,929,526			$	—			$	—			$	4,929,526
Liabilities:
Warrant liabilities		$	—			$	—			$	150,205			$	150,205
Total liabilities measured and recorded at fair value		$	—			$	—			$	150,205			$	150,205

 

		December 31, 2023
		Level 1				Level 2				Level 3				Total
Assets:
Money market funds (cash equivalents)		$	22,211,820			$	—			$	—			$	22,211,820
Total assets measured and recorded at fair value		$	22,211,820			$	—			$	—			$	22,211,820
Liabilities:
Warrant liabilities		$	—			$	—			$	806,655			$	806,655
Total liabilities measured and recorded at fair value		$	—			$	—			$	806,655			$	806,655

 

The following table summarizes the changes in the fair value of the warrant liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

 

		Three Months Ended June 30,								Six Months Ended June 30,
		2024				2023				2024				2023
Balance, beginning of period		$	350,478			$	556,313			$	806,655			$	567,439
Change in fair value of warrant liabilities			(200,273	)			456,177				(656,450	)			445,051
Balance, end of period		$	150,205			$	1,012,490			$	150,205			$	1,012,490

 

In prior years, the Company issued warrants to purchase 556,313 shares of common stock in a private placement (the "Private Warrants") and classified the warrants as derivative liabilites, pursuant to ASC 815, as the warrants have an exercise price that is subject to potential adjustment, with subsequent changes in their fair values to be recognized in the condensed consolidated statement of operations at each reporting date. The Company calculated the fair value of the Private Warrants as of June 30, 2024 and December 31, 2023 as $150,205 and $806,655, respectively, using a Lattice model. The key inputs used in the Lattice calculation were the following:

 

		June 30, 2024				December 31, 2023
Risk-free interest rate			4.92	%			4.25	%
Remaining expected term of Private warrants			1.46				1.96
Expected volatility (1)			144.50	%			89.00	%
Stock price on valuation date		$	1.28			$	5.15
Exercise price		$	11.50			$	11.50
Expected dividend rate			—	%			—	%

⁽¹⁾ Based on volatility implied by guideline company publicly traded warrant market prices.

 

F-16

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ITEM 2.   MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

 

The information in this Management’s Discussion and Analysis of Financial Condition and Results of Operations (“MD&A”) should be read in conjunction with the Company’s condensed consolidated financial statements and the related notes set forth in Item 1 of Part I of this Quarterly Report on Form 10-Q, our MD&A set forth in Item 7 of Part II of the our Annual Report on Form 10-K for the fiscal year ended December 31, 2023 and the Company’s consolidated financial statements and related notes set forth in Item 8 of Part II of such Annual Report on Form 10-K. See Part II, Item 1A, “Risk Factors,” below and “Cautionary Note Regarding Forward-Looking Statements,” below, and the information referenced therein, for a description of risks that we face and important factors that we believe could cause actual results to differ materially from those in our forward-looking statements. All amounts and percentages are approximate due to rounding and all dollars in the text are in millions, except per share amounts or where otherwise noted. When we cross-reference to a “Note,” we are referring to our “Notes to Condensed Consolidated Financial Statements (Unaudited)” included in Part I, Item 1, of this Quarterly Report on Form 10-Q, unless the context indicates otherwise.

 

All statements other than statements of historical fact included in this section regarding our financial position, business strategy and the plans and objectives of management for future operations, are forward-looking statements. When used in this section, words such as “anticipate,” “believe,” “estimate,” “expect,” “intend” and similar expressions, as they relate to our management, identify forward-looking statements. Such forward-looking statements are based on the beliefs of management, as well as assumptions made by, and information currently available to, our management. Actual results could differ materially from those contemplated by the forward- looking statements as a result of certain factors detailed herein. All subsequent written or oral forward-looking statements attributable to us or persons acting on our behalf are qualified in their entirety by this paragraph.

 

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

 

This Quarterly Report on Form 10-Q contains forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 under Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). Forward-looking statements include statements with respect to our beliefs, plans, objectives, goals, expectations, anticipations, assumptions, estimates, intentions and future performance, and involve known and unknown risks, uncertainties and other factors, which may be beyond our control, and which may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by such forward-looking statements. All statements other than statements of historical fact are statements that could be forward-looking statements. You can identify these forward-looking statements through our use of words such as “may,” “can,” “anticipate,” “assume,” “should,” “indicate,” “would,” “believe,” “contemplate,” “expect,” “seek,” “estimate,” “continue,” “plan,” “point to,” “project,” “predict,” “could,” “intend,” “target,” “potential” and other similar words and expressions of the future.

 

There are a number of important factors that could cause the actual results to differ materially from those expressed in any forward-looking statement made by us. These factors include, but are not limited to:

 

●

the success of our current or planned clinical trials through all phases of clinical development, including our ability to conduct and complete clinical trials in accordance with projected timelines, our ability to achieve the desired results, and our ability to successfully complete requisite regulatory review and approval processes;

 

 

●	our ability to obtain the necessary financing to continue to conduct our business operations as planned, and to conduct our ongoing and planned trials, and continue and complete the planned development and commercialization of our product candidates;

 

●	expectations regarding our ability to continue as a going concern;

 

●	our ability to grow and manage growth economically;

 

●	our ability to retain key executives and medical and science personnel;

         

●	the possibility that our products in development succeed in or fail clinical trials or are not approved by the FDA or other applicable authorities;

        

●	the possibility that we could be forced to delay, reduce or eliminate our planned clinical trials or development programs;

         

●	our ability to obtain approval from regulatory agents in different jurisdictions for our current or future product candidates;

        

●	changes in applicable laws or regulations;

         

●	changes to our relationships within the pharmaceutical ecosystem;

 

●	the performance of third-party suppliers and manufacturers and our ability to find additional suppliers and manufacturers and obtain alternative sources of raw materials;

         

●	our current and future capital requirements to support our development and commercialization efforts and our ability to satisfy our capital needs;

 

●	our ability to access capital on acceptable terms in a rising interest rate and tighter credit environment;

         

●	the accuracy of our estimates regarding expenses and capital requirements, including estimated costs of our clinical studies;

 

●	our limited operating history;

 

●	our history of operating losses in each year since inception and expectation that we will continue to incur operating losses for the foreseeable future;

         

●	the valuation of our private common warrants could increase the volatility in our net income (loss);

         

●	changes in the markets that we target;

         

●	our ability to maintain or protect the validity of our patents and other intellectual property;

 

●	our exposure to any liability, protracted and costly litigation or reputational damage relating to data security;

 

 

●	the sufficiency of our existing capital resources to fund our future operating expenses and capital expenditure requirements;

 

●	the commercial, reputational and regulatory risks to our business that may arise as a consequence of our previously-disclosed restatement of our financial statements;

 

●	any disruption to our business that may occur on a longer-term basis should we be unable to remediate the material weaknesses we have identified in our internal controls over financial reporting and clinical trial expenses;

 

●	our ability to maintain the listing of our common stock and listed warrants on Nasdaq;

 

●	the possibility that we may be adversely affected by other economic, business, and/or competitive factors.

 

The foregoing does not represent an exhaustive list of matters that may be covered by the forward-looking statements contained herein or risk factors that we are faced with that may cause our actual results to differ from those anticipated in such forward-looking statements. Please see “Part II-Item 1A-Risk Factors” for additional risks which could adversely impact our business and financial performance.

 

All forward-looking statements are expressly qualified in their entirety by this cautionary notice. You are cautioned not to place undue reliance on any forward-looking statements, which speak only as of the date of this report or the date of the document incorporated by reference into this report. We have no obligation, and expressly disclaims any obligation, to update, revise or correct any of the forward-looking statements, whether as a result of new information, future events or otherwise. We have expressed our expectations, beliefs and projections in good faith and believe they have a reasonable basis. However, we cannot assure you that our expectations, beliefs or projections will result or be achieved or accomplished.

 

Company Overview

 

We are a late-stage pharmaceutical company that discovers, develops, and seeks to commercialize next-generation therapeutics for diseases representing significant unmet medical needs and burdens to society, patients, and their families. Our current pipeline focuses on the central nervous system, inflammatory, and cardiometabolic diseases. We use a chemical genomics driven technology platform and proprietary chemistry to develop new medicines. Our pipeline currently has two drug candidates, brilaroxazine (RP5063) and RP1208. Both are new chemical entities discovered in-house. We have been granted composition of matter patents for both brilaroxazine and RP1208 in the United States (U.S.), Europe, and several other countries.

 

Our lead drug candidate, brilaroxazine, is in clinical development and is intended to treat multiple neuropsychiatric indications. These include schizophrenia, bipolar disorder (“BD”), major depressive disorder (“MDD”), attention-deficit/hyperactivity disorder (“ADHD”), behavioral and psychotic symptoms of dementia and Alzheimer’s disease (“BPSD”), and Parkinson’s disease psychosis (“PDP”). Furthermore, brilaroxazine is also ready for clinical development for two respiratory indications - pulmonary arterial hypertension (“PAH”) and idiopathic pulmonary fibrosis (“IPF”). The U.S. Food and Drug Administration (the "FDA") granted Orphan Drug Designation to brilaroxazine for the treatment of PAH in November 2016 and IPF in April 2018. Brilaroxazine also is in preclinical development for the treatment of psoriasis.

 

Our primary focus is to complete the clinical development of brilaroxazine for the treatment of acute and maintenance schizophrenia.

 

 

On October 30, 2023, we announced positive topline results from our Phase 3 RECOVER 1 trial (the “RECOVER-1 Trial”), which is a global Phase 3, randomized, double-blind, placebo-controlled, multicenter study designed to assess the safety and efficacy of brilaroxazine in approximately 400 patients with acute schizophrenia compared to placebo. See “Recent Developments” below for more details on brilaroxazine development.

 

Subject to the receipt of additional financing, we may also continue the clinical development of brilaroxazine for the treatment of BD, MDD, ADHD, BPSD, PDP, PAH and IPF. Moreover, subject to the receipt of additional financing, we may also advance the development of our second drug candidate, RP1208, for the treatment of depression and obesity.

 

Recent Developments

 

On October 30, 2023, we announced positive topline results and successful completion of our pivotal RECOVER-1 Trial evaluating the efficacy, safety and tolerability of once-daily brilaroxazine, a serotonin dopamine signaling modulator in adults with schizophrenia. The trial successfully met its primary endpoint at the 50 mg dose, with brilaroxazine at that dose achieving a statistically significant and clinically meaningful 10.1-point reduction in Positive and Negative Syndrome Scale (PANSS) total score compared to placebo (-23.9 brilaroxazine 50 mg vs. -13.8 placebo, p<0.001) at week 4. Brilaroxazine also achieved statistically significant and clinically meaningful reductions in all major symptom domains and secondary endpoints at week 4 with the 50 mg dose vs. placebo. The 15 mg dose of brilaroxazine was numerically superior to placebo on the primary endpoint and most secondary endpoints, and reached statistical significance on two key secondary endpoints.

 

Key statistically significant and clinically meaningful improvements with brilaroxazine vs. placebo in patients with schizophrenia and a mean PANSS total score of 97-99 at baseline include:

 

Primary and Secondary Endpoints		Point Reduction/ Improvement for Brilaroxazine 50 mg vs. Placebo at Week 4				Cohen's d Effect Size				P Value
PANSS Total Score			10.1				0.6				<0.001
Positive Symptoms			2.8				0.5				<0.001
Negative Symptoms ("NS")			2.0				0.4				0.003
NS Marder Factor			2.1				0.4				0.002
PANSS Social Cognition			1.6				0.5				<0.001
PANSS Excitement/Agitation			2.1				0.5				<0.001
Personal and Social Performance			6.3				0.5				<0.001
CGI-S score			≥1				0.5				<0.001

 

Key clinical safety and tolerability findings of brilaroxazine support a well-tolerated safety profile

 

•

No drug related serious adverse events (SAEs) or treatment-emergent SAEs (TESAEs) observed or major safety concerns reported for brilaroxazine after 4 weeks of treatment;

•

No incidence of suicidal ideation;

•

No significant change in bodyweight and blood glucose levels;

•

Significant decrease in cholesterol, LDL and increase in HDL compared to placebo;

•

Significant decrease in prolactin and no change in thyroid levels compared to placebo;

•

Akathisia and extrapyramidal symptoms <1% reported for brilaroxazine 50 mg and none for 15 mg;

•

Common brilaroxazine treatment-emergent adverse events (TEAEs) were headache (<6%) and somnolence (7.5%) generally transient in nature; and

•

Low discontinuation rates with brilaroxazine that were less than placebo (16% in brilaroxazine 50mg and 19% in brilaroxazine 15mg vs. 22% placebo).

 

 

The clinical development plan for brilaroxazine also includes the completed positive Phase 2 REFRESH trial, an ongoing 1-year open label extension (OLE) trial evaluating long-term safety and tolerability, and a soon to be initiated registrational global, randomized 4-week Phase 3 RECOVER-2 trial (the “RECOVER-2 Trial”). We expect to report topline data from the OLE trial in Q4-2024, and we expect to initiate the registrational RECOVER-2 Trial in the third quarter of 2024, with completion anticipated in the fourth quarter of 2025. RECOVER-2 was originally designed as a 6-week study, but after discussion between Reviva and the FDA, the agency has agreed that it can be conducted as a 4-week study. In addition, the FDA indicated that it will require a long-term randomized withdrawal study post-approval to support maintenance of effect. Data from these brilaroxazine clinical trials will potentially support the planned NDA submission to the FDA in the first quarter of 2026.

 

Open Label Extension (OLE) Trial Enrollment Update

 

In August 2024, we provided the following enrollment update on our ongoing 1-year open-label extension (OLE) study evaluating the long-term safety and tolerability of brilaroxazine in patients with schizophrenia.

	•	Trial progressing as expected in the United States, Europe (Bulgaria) and Asia (India)
	•	424 patients enrolled in the study; 230 patients currently on treatment in the study
	•	65 patients have completed 12 months of treatment
	•	53 patients who completed 9 months treatment currently in the study
	•	About 200 patients completed 6 months of treatment
	•	Long-term safety data from 100 patients who have completed 12 months of treatment is a requirement for brilaroxazine’s NDA submission to the FDA
	•	We are on track to complete the 12 months long-term safety study in Q4 2024

 

May 2024 Registered Direct Offering

 

On May 29, 2024, we closed our registered direct Offering, pursuant to which we issued and sold an aggregate of 1,898,734 shares of our common stock and the Warrants to purchase up to 1,898,734 shares of our common stock at a combined offering price of $1.58 per share of common stock and accompanying Warrant. The Warrants have an exercise price of $1.455 per share, are immediately exercisable and expire five years following the date of issuance.

 

In connection with the Offering, we also agreed to amend certain existing warrants held by the investor in the Offering to purchase up to an aggregate of 1,365,854 shares of our common stock that were previously issued to the investor in November 2023, with an exercise price of $5.00 per share, for $0.125 per amended warrant, so that the amended warrants have a reduced exercise price of $1.455 per share and expire five years following the closing of the Offering.

 

Financial Overview

 

We have incurred losses since inception and as of June 30, 2024 we have a working capital deficit of approximately $6.7 million, an accumulated deficit of $149.6 million and cash and cash equivalents on hand of approximately $6.2 million. Our net loss for the three months ended June 30, 2024 and 2023, was approximately $7.9 million and $11.7 million, respectively. Our net loss for the for the six months ended June 30, 2024 and 2023, was approximately $15.3 million and $18.6 million, respectively. We expect to incur significant expenses and increased operating losses for the next several years. We expect our expenses to increase in connection with our ongoing activities to research, develop and commercialize our potential product candidates. We will need to generate significant revenues to achieve profitability, and we may never do so.

 

We expect our expenses will increase substantially in connection with our ongoing activities, as we:

 

•	invest significantly to further research and develop, through clinical trials for brilaroxazine including the OLE trial and the registrational RECOVER-2 Trial, and pre-clinical research for RP1208, and seek regulatory approval for our product candidates brilaroxazine and RP1208;

 

•	identify and develop additional product candidates;

 

•	hire additional clinical, scientific and management personnel;

 

•	seek regulatory and marketing approvals for any product candidates that we may develop;

 

 

•	ultimately establish a sales, marketing and distribution infrastructure to commercialize any drugs for which we may obtain marketing approval;

 

•	maintain, expand and protect our intellectual property portfolio;

 

•	acquire or in-license other drugs and technologies; and

 

•

add operational, financial and management information systems and personnel, including personnel to support our product candidate development, and any future commercialization efforts, and our ongoing compliance with and maintenance of public company controls, procedures and regulatory requirements and standards.

 

Research and Development Expenses

 

We focus our resources on research and development activities, including the conduct of preclinical and clinical studies and product development and expense such costs as they are incurred. We have not historically tracked or recorded research and development expenses on a project-by-project basis, primarily because we use our employee and infrastructure resources across multiple research and development projects, and it is not practical for us to allocate such costs on a project-by-project basis. Our research and development expenses primarily consist of clinical trial expenses and employee-related expenses, including deferred salaries, salaries, benefits and taxes for personnel in research and development functions.

 

The largest recurring component of our total operating expenses has historically been research and development activities. we expect our research and development expenses will increase for the next several years as we advance our development programs, pursue regulatory approval of our product candidates in the U.S. and other jurisdictions and prepare for potential commercialization, which would require a significant investment in costs related to contract manufacturing, inventory buildup and sales and marketing activities.

 

 

Our primary product candidates and their current status is as follows:

 

Drug Candidate	Indication	Status
Brilaroxazine (RP5063)	Schizophrenia	Conducted pivotal Phase 3 RECOVER-1 and long-term safety studies. Topline data for the pivotal Phase 3 RECOVER-1 study announced October 30, 2023
Brilaroxazine	Bipolar Disorder	Phase 1 complete**
Brilaroxazine	Depression-MDD	Phase 1 complete**
Brilaroxazine	Alzheimer’s (AD-Psychosis/Behavior)	Phase 1 complete**
Brilaroxazine	Parkinson’s	Phase 1 complete**
Brilaroxazine	ADHD/ADD	Phase 1 complete**
Brilaroxazine	PAH	Phase 1 complete**
Brilaroxazine	IPF	Phase 1 complete**
Brilaroxazine	Psoriasis	In pre-clinical development
RP1208	Depression	Completed pre-clinical development studies, including in vitro receptor binding studies, animal efficacy studies, and PK studies. Compound ready for IND enabling studies.
RP1208	Obesity	Completed pre-clinical development studies, including in vitro receptor binding studies and PK studies. Compound ready for animal efficacy studies.

 

** We completed the Phase 1 clinical study for brilaroxazine prior to starting the Phase 2 study in schizophrenia and schizoaffective disorder, and completed our RECOVER-1 Trial for which we announced topline data in October 2023. In these three studies, we collected safety data for brilaroxazine in over 800 patients, including healthy subjects and patients with stable schizophrenia, acute schizophrenia and schizoaffective disorder. Generally, no separate Phase 1 study is required for conducting a Phase 2 study for an additional indication, provided the treatment doses in the Phase 2 study for an additional indication are within the range of doses tested in the previously completed Phase 1 study.

 

 

The successful development of our platform and product candidates is highly uncertain, and we may never succeed in achieving marketing approval for our product candidates brilaroxazine (RP5063), RP1208, or any future product candidates. In connection with the activities required to complete the development of brilaroxazine for schizophrenia, including our ongoing OLE trial and our planned registrational RECOVER-2 Trial, we expect to incur substantial additional costs over the 2024-2026 period to take us through the submission of the planned NDA for brilaroxazine, together with additional costs post-NDA submission in preparation of potential commercialization if approved. We expect our clinical costs in connection with the development of brilaroxazine for schizophrenia may total approximately $70 million over the next approximately three years, consisting of our estimated costs for (i) completion of our OLE Trial, (ii) our RECOVER-2 Trial through the planned NDA submission, and (iii) additional Research & Development costs (primarily associated with consulting, scientific, research and other expenses in support of the OLE and RECOVER-2 Trials through the planned NDA as well as certain activities in preparation of potential commercialization if the product attains approval). The foregoing forecasted amount of expenses is an estimate based on numerous factors and information available to management as of today, and is subject to change. The actual amount of such expenses could be materially higher or lower than the forecasted amount. The foregoing statements regarding estimates of forecasted future costs and expenses represent forward-looking statements. See “Cautionary Note Regarding Forward-Looking Statements.” At this time, other than providing reasonable estimates and forecasts based on information available to us of what we expect future costs may be in connection with the RECOVER-2 and OLE trials and certain associated expenses and other future activities needed to continue to develop brilaroxazine, we cannot reasonably estimate the nature, timing, or costs of the efforts necessary to finish developing any of our product candidates or the period in which material net cash, if any, from these product candidates may commence. This is due to the numerous risks and uncertainties associated with developing therapeutics, including the uncertainty of:

 

•

the scope, rate of progress, expense, and results of clinical trials;

 

•

the scope, rate of progress, and expense of process development and manufacturing;

 

•

preclinical and other research activities; and

 

•

the timing of regulatory approvals.

 

General Administrative Expenses

 

General and administrative expenses primarily consist of payroll and related costs for employees in executive, business development, finance, and administrative functions. Other significant general and administrative expenses include professional fees for accounting and legal services.

 

We expect general and administrative expenses to increase as we expand infrastructure and continue the development of our clinical programs. Other increases could potentially include increased costs for director and officer liability insurance, costs related to the hiring of additional personnel, and increased fees for directors, outside consultants, lawyers, and accountants. We expect to incur significant costs to comply with corporate governance, internal controls, and similar requirements applicable to public companies.

 

Critical Accounting Estimates

 

Our critical accounting estimates are disclosed in our Annual Report on Form 10-K for the year ended December 31, 2023, as filed with the SEC on April 15, 2024. Since the date of the Annual Report, there have been no material changes in our critical accounting estimates.

 

Previously-Disclosed Restatement of Previously Reported Interim Condensed Consolidated Quarterly Financial Statements

 

The interim consolidated financial statements include corrections to the three and six months ended June 30, 2023, which corrections were previously presented in the audited consolidated financial statements and notes thereto, including specifically Note 10, “Quarterly Financial Data (Unaudited and Restated)”, for the fiscal year ended December 31, 2023, included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as filed with the SEC on April 15, 2024 (sometimes hereinafter referred to as the “2023 Form 10-K”).

 

 

As previously reported in Item 4.02(a) of our Current Report on Form 8-K as filed with the SEC on April 15, 2024, and in our 2023 Form 10-K, on April 12, 2024, we concluded that our previously issued financial statements for the Restatement Periods should be restated to correct historical errors related principally to the timing of recognition of our estimated accrual of certain research and development ("R&D") expenses from a contract research organization, specifically investigator fees, were recorded as R&D expenses during the year ended December 31, 2022 and throughout the year ended December 31, 2023 when the underlying invoices were received, rather than when the services (i.e. patient visit and enrollment (“Patient Visit Date”)) were provided. In addition, we determined that an effective process for evaluating the completeness of the R&D accrual for the investigator fees was necessary. This included determining an estimate for accruals based on estimated patient site visits not yet reported, average site visits costs and average delay in site invoicing. This provides us with an accurate estimate of the costs incurred as there can be a lag between receiving an invoice for the services provided.

 

Therefore, as previously disclosed, we misstated R&D expenses and associated accrued liabilities for the fiscal year ended December 31, 2022 included in its Annual Report on Form 10-K, the interim financial statements for the quarterly period ended September 30, 2022 included in its Quarterly Report on Form 10-Q, and each of the interim financial statements for the quarterly periods in fiscal 2023 included in its Quarterly Reports on Form 10-Q (cumulatively, the “Restatement Periods”). Also as previously disclosed, we principally attribute the errors to (i) a material weakness in internal control activities due to a failure in the design and implementation of our controls to review clinical trial expenses, including the evaluation of the terms of clinical trial contracts, specifically, we failed to properly review and evaluate progress of expenses incurred in clinical trial contracts resulting in us not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received, and (ii) a material weakness in internal controls due to insufficient resources including in relation to our financial close and reporting process with appropriate knowledge and expertise to design, implement, document and operate effective internal controls over financial reporting. This material weakness has a pervasive impact and consequently, impacts control activities over all financial statement account balances, classes of transactions, and disclosure. These material weaknesses were previously disclosed in Item II, Part 9A of our 2023 Form 10-K, and are disclosed in Part I, Item 4 of this Quarterly Report on Form 10-Q. We have commenced procedures to remediate the material weaknesses. However, these material weaknesses will not be considered remediated until the applicable remedial actions have been fully implemented and we have concluded that these controls are operating effectively for a sufficient period of time.

 

The discussion of financial results presented here is reflective of the foregoing adjustments.

 

 

Results of Operations

 

Comparison of the three months ended June 30, 2024 and 2023:

 

The following table summarizes our results of operations for the three months ended June 30, 2024 and 2023:

 

		Three Months Ended June 30,								Change				Change
		2024				2023 (as restated)				Amount				Percentage
Operating expenses
Research and development		$	5,584,347			$	8,256,336			$	(2,671,989	)			(32.4	)%
General and administrative			2,545,296				3,079,301				(534,005	)			(17.3	)%
Total operating expenses			8,129,643				11,335,637
Loss from operations			(8,129,643	)			(11,335,637	)
Gain (loss) on remeasurement of warrant liabilities			200,273				(456,177	)			656,450				(143.9	)%
Interest expense			(5,153	)			(12,759	)			7,606				(59.6	)%
Interest income			87,610				103,080				(15,470	)			(15.0	)%
Other expense, net			(5,621	)			(19	)			(5,602	)			29,484.2	%
Total other income (expense), net			277,109				(365,875	)
Loss before provision for income taxes			(7,852,534	)			(11,701,512	)
Provision for income taxes			7,385				6,436				949				14.7	%
Net loss		$	(7,859,919	)		$	(11,707,948	)

 

Research and Development Expenses

 

Research and development costs are expensed as incurred. These expenses represent both internal and external costs.

 

For the three months ended June 30, 2024 and 2023, research and development expenses were approximately $5.6 million and $8.3 million, respectively. Specifically, during the three months ended June 30, 2024 and 2023, our research and development costs consisted primarily of the following costs associated with our key research and development project for advancing the clinical development of brilaroxazine during the reporting periods, namely our RECOVER-1 Trial for our Phase 3 clinical study for brilaroxazine: (i) internal salaries, wages and other payroll related costs for employees involved in research and development activities, of approximately $0.7 million and $0.8 million, respectively; (ii) internal share-based compensation expenses with respect to employees involved in research and development activities, of approximately $0.2 million and $1.0 million, respectively; (iii) other research and development related costs, of an insignificant amount and approximately $0.1 million, respectively; and (iv) external research and development expenses, of approximately $4.7 million and $6.4 million, respectively, (which includes clinical (including clinical consulting) research and development costs of approximately $3.6 million and $5.4 million, respectively, non-clinical safety related costs of approximately $0.2 million and $0.6 million, respectively, non-clinical manufacturing related costs of approximately $0.9 million and $0.3 million, respectively, and non-clinical consulting and other related costs of an insignificant amount and approximately $0.1 million, respectively).

 

The decrease in research and development expenses for the three months ended June 30, 2024 was primarily due to:

 

●

The transition from the RECOVER-1 Study to the OLE Study. RECOVER-1 was an inpatient study whereas OLE is an outpatient study.

 

We expect our research and development activities to increase as we develop our existing product candidates and potentially acquire new product candidates, reflecting increasing costs associated with our ongoing operations, including expenses associated with activities required to complete the development of brilaroxazine in schizophrenia including our planned registrational RECOVER-2 Trial, to take us through the submission of the planned NDA for brilaroxazine, together with additional costs post-NDA submission in preparation of potential commercialization if approved. For additional information, please see the discussion appearing above in the introductory section of this Part I-Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, of this Quarterly Report on Form 10-Q, under the caption “Financial Overview–Research and Development Expenses”.

 

General and Administrative Expenses

 

For the three months ended June 30, 2024 and 2023, general and administrative expenses were approximately $2.5 million and $3.1 million, respectively. Specifically, during the three months ended June 30, 2024 and 2023, our general and administrative expenses consisted primarily of: (i) stock-based compensation expense of approximately $0.2 million and $1.6 million, respectively; (ii) consultant and professional expenses of approximately $1.1 million and $0.3 million, respectively; (iii) legal expenses of approximately $0.5 million and $0.4 million, respectively; (iv) employee related expenses of approximately $0.5 million and $0.4 million, respectively; and (v) other general and administrative expenses of approximately $0.2 million and $0.4 million, respectively.

 

Gain (Loss) on Remeasurement of Warrant Liabilities 

 

We recognized a remeasurement of warrant liabilities gain of approximately $0.2 million and a loss of approximately $0.5 million for the three months ended June 30, 2024 and 2023, respectively. The approximate $0.2 million gain on remeasurement of warrant liabilities for the three months ended June 30, 2024 resulted from the decrease in the calculated fair value of the warrants, principally as a result of the decrease in our stock price during the three months ended June 30, 2024. The approximate $0.5 million loss on remeasurement of warrant liabilities for the three months ended June 30, 2023 resulted from the increase in calculated fair value of the warrant liabilities, principally as a result of the increase in stock price during the three months ended June 30, 2023.

 

 

Interest Expense

 

We incurred interest expense of approximately $5.2 thousand and $12.8 thousand for the three months ended June 30, 2024 and 2023, respectively. The approximate $7.6 thousand decrease in interest expense was primarily caused by a decrease in the corresponding short-term debt balance for the period.

 

Interest Income

 

Interest income was approximately $87.6 thousand and $103.1 thousand for the three months ended June 30, 2024 and 2023, respectively. While there has been an increase in market interest rates in 2024 compared to 2023, interest income decreased approximately $15.5 thousand primarily due to the Company maintaining a lower cash balance throughout the current period, as compared to the prior period.

 

Other Expense, net

 

Other expense incurred was approximately $5.6 thousand and $0.02 thousand for the three months ended June 30, 2024 and 2023, respectively. The approximate $5.6 thousand decrease was primarily attributable to an unrealized foreign currency translation loss from negative foreign currency fluctuations related to the consolidation of the Company's Indian subsidiary.

 

Comparison of the six months ended June 30, 2024 and 2023:

 

The following table summarizes our results of operations for the six months ended June 30, 2024 and 2023:

 

		Six Months Ended June 30,								Change				Change
		2024				2023 (as restated)				Amount				Percentage
Operating expenses
Research and development		$	11,368,212			$	13,740,481			$	(2,372,369	)			(17.3	)%
General and administrative			4,683,537				4,579,855				103,682				2.3	%
Total operating expenses			16,051,749				18,320,336
Loss from operations			(16,051,749	)			(18,320,336	)
Gain (loss) on remeasurement of warrant liabilities			656,450				(445,051	)			1,101,501				(247.5	)%
Interest expense			(8,640	)			(20,414	)			11,774				(57.7	)%
Interest income			260,708				250,091				10,617				4.2	%
Other expense, net			(135,515	)			(14,513	)			(121,002	)			833.7	%
Total other income (expense), net			773,003				(229,887	)
Loss before provision for income taxes			(15,278,746	)			(18,550,223	)
Provision for income taxes			14,781				9,414				5,367				57.0	%
Net loss		$	(15,293,527	)		$	(18,559,637	)

 

Research and Development Expenses

 

Research and development costs are expensed as incurred. These expenses represent both internal and external costs.

 

For the six months ended June 30, 2024 and 2023, research and development expenses were approximately $11.4 million and $13.7 million, respectively. Specifically, during the six months ended June 30, 2024 and 2023, our research and development costs consisted primarily of the following costs associated with our key research and development project for advancing the clinical development of brilaroxazine during the reporting periods, namely our RECOVER-1 Trial for our Phase 3 clinical study for brilaroxazine: (i) internal salaries, wages and other payroll related costs for employees involved in research and development activities, of approximately $1.5 million and $1.4 million, respectively; (ii) internal share-based compensation expenses with respect to employees involved in research and development activities, of approximately $0.4 million and $1.0 million, respectively; (iii) other research and development related costs, of an insignificant amount and approximately $0.2 million, respectively; and (iv) external research and development expenses, of approximately $9.5 million and $11.1 million, respectively (which includes clinical (including clinical consulting) research and development costs of approximately $6.9 million and $9.1 million, respectively, non-clinical safety related costs of approximately $0.5 million and $1.3 million, respectively, non-clinical manufacturing related costs of approximately $1.8 million and $0.5 million, respectively, and non-clinical consulting and other related costs of approximately $0.3 million and $0.2 million, respectively).

 

The decrease in research and development expenses for the six months ended June 30, 2024 was primarily due to:

 

●

The transition from the RECOVER-1 Study to the OLE Study. RECOVER-1 was an inpatient study whereas OLE is an outpatient study.

 

We expect our research and development activities to increase as we develop our existing product candidates and potentially acquire new product candidates, reflecting increasing costs associated with our ongoing operations, including expenses associated with activities required to complete the development of brilaroxazine in schizophrenia including our planned registrational RECOVER-2 Trial, to take us through the submission of the planned NDA for brilaroxazine, together with additional costs post-NDA submission in preparation of potential commercialization if approved. For additional information, please see the discussion appearing above in the introductory section of this Part I-Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, of this Quarterly Report on Form 10-Q, under the caption “Financial Overview–Research and Development Expenses”.

 

 

General and Administrative Expenses

 

For the six months ended June 30, 2024 and 2023, general and administrative expenses were approximately $4.7 million and $4.6 million, respectively. Specifically, during the six months ended June 30, 2024 and 2023, our general and administrative expenses consisted primarily of: (i) stock-based compensation expense of approximately $0.3 million and $1.6 million, respectively; (ii) consultant and professional expenses of approximately $2.1 million and $0.8 million, respectively; (iii) legal expenses of approximately $0.8 million and $0.6 million, respectively; (iv) employee related expenses of approximately $1.0 million and $0.9 million, respectively; and (v) other general and administrative expenses of approximately $0.4 million and $0.7 million, respectively.

 

Gain (Loss) on Remeasurement of Warrant Liabilities 

 

We recognized a remeasurement of warrant liabilities gain of approximately $0.7 million and a loss of $0.4 million for the six months ended June 30, 2024 and 2023, respectively. The approximate $0.7 million gain on remeasurement of warrant liabilities for the six months ended June 30, 2024 resulted from the decrease in the calculated fair value of the warrants, principally as a result of the decrease in our stock price during the six months ended June 30, 2024. The approximate $0.4 million loss on remeasurement of warrant liabilities for the six months ended June 30, 2023 resulted from the increase in the calculated fair value of the warrants, principally as a result of the increase in stock price during the six months ended June 30, 2023.

 

Interest Expense

 

We incurred interest expense of approximately $8.6 thousand and $20.4 thousand for the six months ended June 30, 2024 and 2023, respectively. The approximate $11.8 thousand decrease in interest expense was primarily caused by a decrease in the corresponding short-term debt balance for the period.

 

Interest Income

 

Interest income was approximately $260.7 thousand and $250.1 thousand for the six months ended June 30, 2024 and 2023, respectively. Interest income slightly increased by approximately $10.6 thousand primarily due to the increase in market interest rates in 2024 as compared to 2023, offset partially by the Company maintaining a lower cash balance at the end of the six month period compared to the prior period.

 

Other Expense, net

 

Other expense incurred was approximately $135.5 thousand and $14.5 thousand for the six months ended June 30, 2024 and 2023, respectively. The approximate $121.0 thousand increase in other expense was primarily attributable to an unrealized foreign currency translation loss from negative foreign currency fluctuations related to the consolidation of the Company's Indian subsidiary.

 

Liquidity and Capital Resources

 

						December 31,				Change
		June 30, 2024				2023				Amount				Percentage
Balance Sheet Data:
Cash and cash equivalents		$	6,178,180			$	23,367,456			$	(17,189,276	)			(73.6	)%
Working capital (deficit)			(6,711,038	)			6,525,371				(13,236,409	)			(202.8	)%
Total assets			8,052,674				23,700,388				(15,647,714	)			(66.0	)%
Total stockholders' equity (deficit)			(6,041,522	)			5,718,716				(11,760,238	)			(205.6	)%

 

		Six Months Ended June 30,								Change
		2024				2023				Amount				Percentage
Statement of Cash Flow Data:
Net cash used in operating activities		$	(20,201,997	)		$	(13,268,624	)		$	(6,933,373	)			52.3	%
Net cash provided by financing activities			3,012,721				5,900,350				(2,887,629	)			(48.9	)%
Net decrease in cash and cash equivalents		$	(17,189,276	)		$	(7,368,274	)		$	(9,821,002	)			133.3	%

 

Capital Resources

 

We have funded our operations to date primarily from the issuance and sale of our equity and convertible equity securities. As of June 30, 2024 we had cash and cash equivalents of approximately $6.2 million. To fund our current operating plans, we will need to raise additional capital. Our existing cash and cash equivalents will not be sufficient for us to complete development of our product candidates and, if applicable, to prepare for commercializing any product candidate that may receive approval. Accordingly, we will continue to require substantial additional capital beyond our existing cash to continue our clinical development and potential commercialization activities. We believe that we have adequate cash on hand to cover anticipated outlays into the third quarter of fiscal year 2024, but will need additional fundraising activities and cash on hand during the third quarter of fiscal year 2024. These conditions raise substantial doubt regarding our ability to continue as a going concern for a period of one year after the date the financial statements are issued. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our clinical development efforts. We will seek to fund our operations through public or private equity or debt financings or other sources, which may include collaborations with third parties. In May 2024 we raised capital through a registered financial offering. Adequate additional financing may not be available to us on acceptable terms, or at all. Our failure to raise capital as and when needed would have a negative impact on our financial condition, and our ability to pursue our business strategy, and our ability to continue as a going concern. We cannot assure you that we will ever be profitable or generate positive cash flow from operating activities.

 

 

We expect to continue to incur significant expenses and operating losses for the foreseeable future as we continue our research and preclinical and clinical development of our product candidates; expand the scope of our current studies for our product candidates; initiate additional preclinical, clinical or other studies for our product candidates; change or add additional manufacturers or suppliers; seek regulatory and marketing approvals for any of our product candidates that successfully complete clinical studies; seek to identify, evaluate and validate additional product candidates; acquire or in-license other product candidates and technologies; maintain, protect and expand our intellectual property portfolio; attract and retain skilled personnel; and experience any delays or encounter issues with any of the above.

 

In January 2024, we obtained financing for certain Director & Officer liability insurance policy premiums. The governing agreement assigns the lender a first priority lien on and security interest in the financed policies and any additional premium required in the financed policies. The total premiums, taxes, and fees financed was $519 thousand with an annual percentage interest rate of 7.99% and has a term of 12 months.

 

For the six months ended June 30, 2024 there were no warrants exercised.

 

On May 28, 2024, we entered into the Purchase Agreement pursuant to which we sold, in the Offering, priced at the market under Nasdaq rules which closed on May 29, 2024, an aggregate of (i) 1,898,734 shares of our common stock, and (ii) the Warrants, which are exercisable for an aggregate of up to 1,898,734 shares of our common stock. The public offering price for each share of our common stock and accompanying Warrant to purchase one share of our common stock was $1.58. The Warrants have a term of 5 years and expire on May 29, 2029. The net proceeds to the Company from the Offering were $2.8 million, after deducting placement offering costs, agent fees and expenses and other offering expenses payable by the Company, of approximately $0.4 million.

 

Until such time as we can generate substantial product revenue, if ever, we expect to finance our cash needs through a combination of equity or debt financings and collaboration agreements. We do not currently have any committed external sources of capital. To the extent that we raise additional capital through the future sale of equity or debt, the ownership interest of our stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our existing stockholders. If we raise additional funds through collaboration agreements in the future, we may have to relinquish valuable rights to our technologies, future revenue streams or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves. Adequate additional financing may not be available to us on acceptable terms, or at all. If we are not able to secure additional funding when needed, we may have to delay, reduce the scope of or eliminate one or more of our clinical trials or research and development programs or make changes to our operating plan, or curtail or cease operations. We will need to generate significant revenues to achieve profitability, and we may never do so.

 

Cash Flows

 

Net Cash Used in Operating Activities

 

Net cash used in operating activities for the six months ended June 30, 2024 was approximately $20.2 million, consisting primarily of a net loss of approximately $15.3 million, adjusted for non-cash items, including a change in fair value of warrant liabilities gain of approximately $0.7 million, and stock-based compensation expense of approximately $0.8 million, coupled with a change in our operating assets and liabilities totaling approximately $5.0 million. The $5.0 million change in net operating assets and liabilities was primarily due to a decrease in accrued clinical expenses and other accrued expenses coupled with an increase in prepaid clinical trial costs, and an increase in prepaid expenses and other current assets, offset by an increase in accounts payable and an increase in accrued compensation.

 

 

Net cash used in operating activities for the six months ended June 30, 2023, was approximately $13.3 million, consisting primarily of a net loss of approximately $18.6 million, adjusted for non-cash items, including a change in fair value of warrant liabilities loss of approximately $0.4 million, and stock-based compensation expense of approximately $2.7 million, coupled with a change in our operating assets and liabilities totaling approximately $2.2 million. The $2.2 million change in net operating assets and liabilities was primarily due to a decrease in accounts payable coupled with an increase in accrued expenses and other current liabilities and prepaid expenses and other current assets.

 

Net Cash Provided by Financing Activities

 

Net cash provided by financing activities for the six months ended June 30, 2024 was approximately $3.0 million. Cash provided by financing activities was attributable to approximately $2.8 million in proceeds from the issuance of common stock and warrants and from modification of existing warrants, net of issuance costs, approximately $0.4 million related to proceeds from the issuance of short-term debt, slightly offset by the repayments of short-term debt of approximately $0.2 million.

 

Net cash provided by financing activities for the six months ended June 30, 2023 was approximately $5.9 million. Cash provided by financing activities was attributable to approximately $0.7 million in proceeds from the issuance of short-term debt and approximately $5.7 million in proceeds from the exercise of warrants for common stock, slightly offset by the repayments of short-term debt of approximately $0.5 million.

 

Off-Balance Sheet Arrangements

 

We did not have during the periods presented, and do not currently have, any off-balance sheet arrangements, as defined under SEC rules.

 

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

 

As a smaller reporting company, we are not required to provide the information called for by this item.

 

ITEM 4. CONTROLS AND PROCEDURES

 

Evaluation of Disclosure Controls and Procedures

 

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports under the Exchange Act, and the rules and regulations thereunder, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow for timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

 

As required by Rule 13a-15(b) under the Exchange Act, our management, under the supervision and with the participation of our principal executive officer and principal financial officer, has evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of June 30, 2024. Based on such evaluation, as a result of the material weaknesses in internal control over financial reporting and clinical trial expenses described below, our principal executive officer and principal financial officer have concluded that, as of June 30, 2024, our disclosure controls and procedures were not effective at the reasonable assurance level.

 

 

There is a material weakness in our internal control activities due to a failure in the design and implementation of our controls to review clinical trial expenses, including the evaluation of the terms of clinical trial contracts. Specifically, we failed to properly review and evaluate progress of expenses incurred in clinical trial contracts resulting in us not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received. In addition, there is a material weakness in our internal control environment over financial reporting due to insufficient resources including in relation to our financial close and reporting process with appropriate knowledge and expertise to design, implement, document and operate effective internal controls over financial reporting. This material weakness has a pervasive impact and consequently, impacts control activities over all financial statement account balances, classes of transactions, and disclosure.

 

We are committed to continuing to improve our internal control over financial reporting and the review of our clinical trial expenses. As of the date hereof, we have commenced procedures to remediate the material weaknesses. We will continue to monitor the design and effectiveness of these procedures and controls and make any further changes we determine appropriate.

 

Notwithstanding the existence of the material weaknesses as described above, we believe that the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q fairly present, in all material respects, our financial position, results of operations, and cash flow as of the dates, and for the periods presented, in conformity with GAAP.

 

Changes in Internal Control Over Financial Reporting

 

Except as described above, there was no change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

 

Inherent Limitations on Effectiveness of Controls

 

Our management does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the controls. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

 

 

PART II – OTHER INFORMATION

 

ITEM 1. LEGAL PROCEEDINGS.

 

We may, from time to time, become involved in various lawsuits and legal proceedings, which arise in the ordinary course of business. Litigation is subject to inherent uncertainties, and an adverse result in these or other matters may arise from time to time that may harm our business. We are currently not aware of any such legal proceedings or claims that may be, individually or in the aggregate, material to us.

 

ITEM 1A. RISK FACTORS.

 

In addition to the other information set forth in this report, you should carefully consider the factors discussed in Part I, “Item 1A. Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as filed with the SEC on April 15, 2024, which could materially affect our business, financial condition or future results. The risks described in our Annual Report on Form 10-K, for the fiscal year ended December 31, 2023, as filed with the SEC on April 15, 2024, may not be the only risks facing the Company. Additional risks and uncertainties not currently known to the Company or that the Company currently deems to be immaterial also may materially adversely affect the Company’s business, financial condition and/or operating results.

 

There were no material changes to the risk factors previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as filed with the SEC on April 15, 2024.

 

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS.

 

There were no unregistered sales of equity securities during the period covered by this report.

 

ITEM 3. DEFAULTS UPON SENIOR SECURITIES.

 

None.

 

ITEM 4. MINE SAFETY DISCLOSURES.

 

Not applicable.

 

ITEM 5. OTHER INFORMATION.

 

Rule 10b5-1 Trading Arrangements and Non-Rule 10b5-1 Trading Arrangements

 

During the fiscal quarter ended June 30, 2024, none of our officers or directors, as those terms are defined in Rule 16a-1(f), adopted or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Item 408 of Regulation S-K.

 

16

---

 

  

ITEM 6. EXHIBITS

 

Exhibit No.		Exhibit
4.1		Form of Common Warrant from May 2024 Offering (incorporated by reference from Exhibit 4.1 to the Company’s Current Report on Form 8-K filed with the SEC on May 29, 2024).
4.2		Form of Warrant Amendment Agreement from May 2024 Offering (incorporated by reference from Exhibit 4.2 to the Company’s Current Report on Form 8-K filed with the SEC on May 29, 2024)
10.1		Form of Securities Purchase Agreement from May 2024 Offering (incorporated by reference from Exhibit 10.1 to the Company’s Current Report on Form 8-K filed with the SEC on May 29, 2024).
31.1*		Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a)
31.2*		Certification of Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a)
32.1**		Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350
101.INS*		Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH*		Inline XBRL Taxonomy Extension Schema Document
101.CAL*		Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*		Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*		Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE*		Inline XBRL Taxonomy Extension Presentation Linkbase Document
104*		Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibits 101)
*		Filed herewith.
**		The certifications furnished in Exhibit 32.1 hereto are deemed to accompany this Quarterly Report on Form 10-Q and will not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and will not be deemed to be incorporated by reference into any filing under such Act or the Securities Act of 1933, as amended, except to the extent that the registrant specifically incorporates such certifications by reference.

 

 

SIGNATURES

 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

 

	Reviva Pharmaceuticals Holdings, Inc. (Registrant)
Date: August 14, 2024	/s/ Laxminarayan Bhat
	Laxminarayan Bhat
	Chief Executive Officer
	(Principal Executive Officer)
Date: August 14, 2024	/s/ Narayan Prabhu
	Narayan Prabhu
	Chief Financial Officer
	(Principal Financial and Accounting Officer)

 

Exhibit 31.1

 

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

Pursuant to

Securities Exchange Act Rules 13a-14(a) and 15d-14(a),

As Adopted Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

 

I, Laxminarayan Bhat, hereby certify that:

 

1. I have reviewed this Quarterly Report on Form 10-Q of Reviva Pharmaceuticals Holdings, Inc.;

 

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

 

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, and cash flows of the registrant as of, and for, the periods presented in this report;

 

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

 

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

 

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

 

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

 

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and;

 

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

 

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

 

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

 

Date:	August 14, 2024
	/s/ Laxminarayan Bhat
	Laxminarayan Bhat
	Chief Executive Officer
	(Principal Executive Officer)

 

Exhibit 31.2

 

CERTIFICATION OF THE CHIEF FINANCIAL OFFICER

Pursuant to

Securities Exchange Act Rules 13a-14(a) and 15d-14(a),

As Adopted Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

 

I, Narayan Prabhu, hereby certify that:

 

1. I have reviewed this Quarterly Report on Form 10-Q of Reviva Pharmaceuticals Holdings, Inc.;

 

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

 

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, and cash flows of the registrant as of, and for, the periods presented in this report;

 

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

 

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

 

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

 

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

 

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting;

 

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

 

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

 

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

 

Date:	August 14, 2024
	/s/ Narayan Prabhu
	Narayan Prabhu
	Chief Financial Officer
	(Principal Financial and Accounting Officer)

 

Exhibit 32.1

 

CERTIFICATIONS OF CHIEF EXECUTIVE OFFICER

AND CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350,

As Adopted Pursuant To Section 906 Of THE SARBANES-OXLEY ACT OF 2002

 

In connection with the Quarterly Report of Reviva Pharmaceuticals Holdings, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), Laxminarayan Bhat, as Chief Executive Officer of the Company, and Narayan Prabhu, Chief Financial Officer of the Company, each hereby certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350), to his knowledge:

 

1.

The Quarterly Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

 

2.

The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

IN WITNESS WHEREOF, the undersigned have set their hands hereto as of the 14th day of August, 2024.

 

/s/ Laxminarayan Bhat		/s/ Narayan Prabhu
Laxminarayan Bhat		Narayan Prabhu
Chief Executive Officer		Chief Financial Officer
(Principal Executive Officer)		(Principal Financial and Accounting Officer)

 

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

 

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002, or other document authenticating, acknowledging, or otherwise adopting the signatures that appear in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

 

v3.24.2.u1

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Aug. 12, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-38634
Entity Registrant Name	Reviva Pharmaceuticals Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-4306526
Entity Address, Address Line One	10080 N. Wolfe Road, Suite SW3-200
Entity Address, City or Town	Cupertino
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95014
City Area Code	408
Local Phone Number	501-8881
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		29,817,294
Entity Central Index Key	0001742927
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	RVPH
Security Exchange Name	NASDAQ
Warrant [Member]
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase one share of Common Stock
Trading Symbol	RVPHW
Security Exchange Name	NASDAQ

v3.24.2.u1

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 6,178,180	$ 23,367,456
Prepaid clinical trial costs	528,947	78,295
Prepaid expenses and other current assets	525,826	254,637
Total current assets	7,232,953	23,700,388
Non-current prepaid clinical trial costs	819,721	0
Total Assets	8,052,674	23,700,388
Liabilities
Short-term debt	207,500	0
Accounts payable	4,693,360	3,849,108
Accrued clinical expenses	7,301,782	11,966,812
Accrued compensation	1,295,978	958,607
Other accrued liabilities	445,371	400,490
Total current liabilities	13,943,991	17,175,017
Warrant liabilities	150,205	806,655
Total Liabilities	14,094,196	17,981,672
Stockholders' Equity (Deficit)
Common stock, par value of $0.0001; 115,000,000 shares authorized; 29,817,294 and 27,918,560 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively	2,982	2,792
Preferred Stock, par value of $0.0001; 10,000,000 shares authorized; 0 shares issued and outstanding as of June 30, 2024 and December 31, 2023	0	0
Additional paid-in capital	143,603,271	140,070,172
Accumulated deficit	(149,647,775)	(134,354,248)
Total stockholders' equity (deficit)	(6,041,522)	5,718,716
Total Liabilities and Stockholders' Equity (Deficit)	$ 8,052,674	$ 23,700,388

v3.24.2.u1

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2024	Dec. 31, 2023
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	115,000,000	115,000,000
Common Stock, Shares, Outstanding (in shares)	29,817,294	27,918,560
Common Stock, Shares, Issued (in shares)	29,817,294	27,918,560
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized (in shares)	10,000,000	10,000,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0

v3.24.2.u1

Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating expenses
Research and development	$ 5,584,347	$ 8,256,336	$ 11,368,212	$ 13,740,481
General and administrative	2,545,296	3,079,301	4,683,537	4,579,855
Total operating expenses	8,129,643	11,335,637	16,051,749	18,320,336
Loss from operations	(8,129,643)	(11,335,637)	(16,051,749)	(18,320,336)
Other income (expense)
Gain (loss) on remeasurement of warrant liabilities	200,273	(456,177)	656,450	(445,051)
Interest expense	(5,153)	(12,759)	(8,640)	(20,414)
Interest income	87,610	103,080	260,708	250,091
Other expense, net	(5,621)	(19)	(135,515)	(14,513)
Total other income (expense), net	277,109	(365,875)	773,003	(229,887)
Loss before provision for income taxes	(7,852,534)	(11,701,512)	(15,278,746)	(18,550,223)
Provision for income taxes	7,385	6,436	14,781	9,414
Net loss	$ (7,859,919)	$ (11,707,948)	$ (15,293,527)	$ (18,559,637)
Net loss per share:
Basic and diluted (in dollars per share)	$ (0.26)	$ (0.52)	$ (0.51)	$ (0.84)
Weighted average shares outstanding
Basic and diluted (in shares)	30,555,012	22,434,781	30,221,168	22,135,850

v3.24.2.u1

Condensed Consolidated Statement of Stockholders' Equity (Deficit) (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2022	20,447,371
Balance at Dec. 31, 2022	$ 2,045	$ 103,485,612	$ (95,093,411)	$ 8,394,246
Stock-based compensation expense	0	2,672,346	0	2,672,346
Net loss	$ 0	0	(18,559,637)	(18,559,637)
Common stock issued in connection with warrant exercises (in shares)	2,202,895
Common stock issued in connection with warrant exercises	$ 220	5,677,630	0	5,677,850
Balance (in shares) at Jun. 30, 2023	22,650,266
Balance at Jun. 30, 2023	$ 2,265	111,835,588	(113,653,048)	(1,815,195)
Balance (in shares) at Mar. 31, 2023	20,452,121
Balance at Mar. 31, 2023	$ 2,045	103,556,732	(101,945,100)	1,613,677
Stock-based compensation expense	0	2,620,819	0	2,620,819
Net loss	$ 0	0	(11,707,948)	(11,707,948)
Common stock issued in connection with warrant exercises (in shares)	2,198,145
Common stock issued in connection with warrant exercises	$ 220	5,658,037	0	5,658,257
Balance (in shares) at Jun. 30, 2023	22,650,266
Balance at Jun. 30, 2023	$ 2,265	111,835,588	(113,653,048)	(1,815,195)
Balance (in shares) at Dec. 31, 2023	27,918,560
Balance at Dec. 31, 2023	$ 2,792	140,070,172	(134,354,248)	5,718,716
Issuance of common stock and warrants in offering, net of transaction costs (in shares)	1,898,734
Issuance of common stock and warrants in offering, net of transaction costs	$ 190	1,494,292	0	1,494,482
Issuance of warrants in offering, net of transaction costs	0	1,081,689	0	1,081,689
Modification of existing warrants, net of transaction costs	0	229,050	0	229,050
Stock-based compensation expense	0	728,068	0	728,068
Net loss	$ 0	0	(15,293,527)	(15,293,527)
Balance (in shares) at Jun. 30, 2024	29,817,294
Balance at Jun. 30, 2024	$ 2,982	143,603,271	(149,647,775)	(6,041,522)
Balance (in shares) at Mar. 31, 2024	27,918,560
Balance at Mar. 31, 2024	$ 2,792	140,439,247	(141,787,856)	(1,345,817)
Issuance of common stock and warrants in offering, net of transaction costs (in shares)	1,898,734
Issuance of common stock and warrants in offering, net of transaction costs	$ 190	1,494,292	0	1,494,482
Issuance of warrants in offering, net of transaction costs	0	1,081,689	0	1,081,689
Modification of existing warrants, net of transaction costs	0	229,050	0	229,050
Stock-based compensation expense	0	358,993	0	358,993
Net loss	$ 0	0	(7,859,919)	(7,859,919)
Balance (in shares) at Jun. 30, 2024	29,817,294
Balance at Jun. 30, 2024	$ 2,982	$ 143,603,271	$ (149,647,775)	$ (6,041,522)

v3.24.2.u1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract
Net loss	$ (15,293,527)	$ (18,559,637)
Adjustments to reconcile net loss to net cash used in operating activities
Change in fair value of warrant liabilities	(656,450)	445,051
Stock-based compensation expense	728,068	2,672,346
Changes in operating assets and liabilities:
Prepaid clinical trial costs	(1,270,373)	0
Prepaid expenses and other current assets	(271,189)	(286,621)
Accounts payable	844,252	(871,984)
Accrued expenses and other current liabilities	(4,282,778)	3,332,221
Net cash used in operating activities	(20,201,997)	(13,268,624)
Cash flows from financing activities
Proceeds from issuance of short-term debt	415,000	667,500
Repayment of short-term debt	(207,500)	(445,000)
Proceeds from issuance of common stock and warrants and from modification of existing warrants, in offering, net of issuance costs	2,805,221	0
Proceeds from exercise of warrants	0	5,677,850
Net cash provided by financing activities	3,012,721	5,900,350
Net decrease in cash and cash equivalents	(17,189,276)	(7,368,274)
Cash and cash equivalents, beginning of period	23,367,456	18,519,856
Cash and cash equivalents, end of period	6,178,180	11,151,582
Supplemental disclosures of cash flow information:
Cash paid for taxes	3,417	3,941
Cash paid for interest	8,640	20,414
us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract
Warrant modification recorded in stockholders' deficit	229,050	0
Issuance of common stock warrants	$ 1,081,689	$ 0

v3.24.2.u1

Note 1 - Organization and Nature of Operations	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1.  ORGANIZATION AND NATURE OF OPERATIONS   On December 14, 2020, Reviva Pharmaceuticals Holdings, Inc. (the “Company”), a Delaware corporation and the successor by re-domiciliation to Tenzing Acquisition Corp. (“Tenzing”), a British Virgin Islands exempted company, Tenzing Merger Subsidiary Inc., a Delaware corporation and wholly-owned subsidiary of Tenzing (“Merger Sub”), and Reviva Pharmaceuticals, Inc., a Delaware corporation (together with its consolidated subsidiary), consummated a business combination (the “Business Combination”) through the merger of Merger Sub with and into Reviva Pharmaceuticals, Inc. (the "Merger"), in accordance with the Agreement and Plan of Merger, dated as of July 20, 2020 (the “Merger Agreement”), by and among Tenzing, Merger Sub, Reviva Pharmaceuticals, Inc., and the other parties thereto. Pursuant to the Merger Agreement, at the effective time of the Merger, Merger Sub merged with and into Reviva Pharmaceuticals, Inc., with Reviva Pharmaceuticals, Inc. as the surviving company in the Merger and, after giving effect to such Merger, Reviva Pharmaceuticals, Inc. becoming a wholly-owned subsidiary of Reviva Pharmaceuticals Holdings, Inc. In these notes to the unaudited condensed consolidated financial statements, unless otherwise specified or the context indicates otherwise, references to the “Company,” “Reviva,” “we,” “us” and “our” refer to Reviva Pharmaceuticals Holdings, Inc. and its consolidated subsidiary.   Reviva Pharmaceuticals, Inc. was originally incorporated in the state of Delaware and commenced operations on May 1, 2006 and its Indian subsidiary, Reviva Pharmaceuticals India Pvt. Ltd. was incorporated in 2014. The Company is a late-stage pharmaceutical company developing new therapies that seek to address unmet medical needs in the areas of central nervous system (CNS), inflammatory and cardiometabolic diseases.

v3.24.2.u1

Note 2 - Summary of Significant Accounting Policies and Basis of Presentation	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Significant Accounting Policies [Text Block]	2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION   Basis of presentation   The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 8 of Regulation S-X. Certain footnotes and other financial information normally required by accounting principles generally accepted in the United States of America, or GAAP, have been condensed or omitted in accordance with such rules and regulations. In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as our annual consolidated financial statements and notes thereto and include all adjustments, consisting of normal recurring items, considered necessary for the fair presentation. The operating results for the three and six months ended June 30, 2024 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2024.   The unaudited condensed consolidated balance sheet as of December 31, 2023, has been derived from our audited financial statements at that date but does not include all disclosures and financial information required by GAAP for complete financial statements. The information included in the quarterly report on Form 10-Q should be read in conjunction with our consolidated financial statements and notes thereto for the year ended December 31, 2023, which were included in our annual report on Form 10-K, as filed with the Securities and Exchange Commission on April 15, 2024.   Reclassifications   Certain amounts in the prior year’s consolidated financial statements, as of December 31, 2023 have been reclassified to conform to the current period's presentation. This involved disclosing separately, prepaid clinical trial costs from the prepaid expenses and other current assets balance, which were previously disclosed in the aggregate. This reclassification had no effect on the Company’s loss from operations, net loss, or net loss per share. Principles of consolidation   The accompanying condensed consolidated financial statements include the accounts of the Reviva Pharmaceuticals Holdings, Inc. and its wholly owned subsidiary Reviva Pharmaceuticals, India Pvt Ltd. The Company’s subsidiary’s functional currency is the U.S. dollar. The Company recognizes a foreign currency gain or loss each reporting period, on translation of its foreign subsidiary's financial information on consolidation. Any such foreign currency gain or loss is recognized as part of other expense, net, on the condensed consolidated statement of operations. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America. All transactions and balances between the parent and its subsidiary have been eliminated in consolidation.   Previously-disclosed restatement of previously reported interim condensed consolidated quarterly financial statements   The interim consolidated financial statements include corrections to the three and six months ended June 30, 2023, which corrections were previously presented in the audited consolidated financial statements and notes thereto, including specifically Note 10, “Quarterly Financial Data (Unaudited and Restated)”, for the fiscal year ended December 31, 2023, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as filed with the SEC on April 15, 2024 (sometimes hereinafter referred to as the “2023 Form 10-K”).   As previously reported in Item 4.02(a) of the Company’s Current Report on Form 8-K as filed with the SEC on April 15, 2024, and in the Company’s 2023 Form 10-K, on April 12, 2024, the audit committee (the “audit committee”) of the board of directors of the Company, after meeting with management, concluded that the Company’s previously issued financial statements for the fiscal year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, the interim financial statements for the quarterly period ended September 30, 2022 included in its Quarterly Report on Form 10-Q, and each of the interim financial statements for the quarterly periods in fiscal 2023 included in its Quarterly Reports on Form 10-Q (cumulatively, the “Restatement Periods”) should be restated to correct historical errors related principally to the timing of recognition of the Company’s estimated accrual of certain research and development expenses.   The need for the restatement arose out of the results of certain financial analysis the Company performed in the course of preparing its fiscal year-end 2023 consolidated financial statements. Principally, the Company completed a detailed lookback analysis to compare certain estimated accrued clinical trial expenses, specifically investigator fees, from one contract research organization to its actual clinical trial expenses that were incurred for the respective periods for that contract research organization during the Restatement Periods based on review of historical invoices. In the course of its analysis of the actual information gathered through the lookback process, the Company detected differences between the estimated accrued amounts of those clinical trial expenses and the actual expenses recorded due primarily to the Company’s failure to properly review and evaluate expenses incurred in those clinical trial contracts resulting in the Company not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received. In addition, the Company determined that an effective process for evaluating the completeness of the research and development expense accrual for investigator fees and related costs, for that contract research organization, was necessary. This included estimated patient site visits not yet reported, average site visit costs and average delay in site invoicing. This provides the Company with an effective estimate of the costs incurred as there can be a lag between receiving an invoice for the services provided from that contract research organization. Management and the audit committee of the Company’s board of directors concluded that, in the ordinary course of closing its financial books and records, the Company previously excluded certain clinical trial expenses and associated accruals from the appropriate periods as required under applicable accounting guidelines. Therefore, the Company misstated research and development expenses, and accrued clinical expenses for the three and six months ended June 30, 2023.   As previously disclosed, the Company misstated research and development expenses and associated accrued liabilities during the Restatement Periods. Also as previously disclosed, the Company principally attributes the errors to a material weakness in its internal control activities due to a failure in the design and implementation of its controls to review clinical trial expenses, including the evaluation of the terms of clinical trial contracts. Specifically, the Company failed to properly review and evaluate progress of expenses incurred in clinical trial contracts resulting in the Company not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received. These material weaknesses were previously disclosed in Item II, Part 9A of the Company’s 2023 Form 10-K, and are disclosed in Part I, Item 4 of this Quarterly Report on Form 10-Q. The Company has commenced procedures to remediate the material weaknesses. However, these material weaknesses will not be considered remediated until the applicable remedial actions have been fully implemented and the Company has concluded that these controls are operating effectively for a sufficient period of time.   These condensed consolidated financial statements and the corresponding discussion included in Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, are reflective of the restatement adjustments for the three and six months ended June 30, 2023, as previously presented in Note 10 to the Company’s consolidated financial statements included in the 2023 Form 10-K.   As previously disclosed in Note 10, “Quarterly Financial Data (Unaudited and Restated)”, to the Consolidated Financial Statements included in the Company’s 2023 Form 10-K, the restated line items of the consolidated statement operations for three and six months ended June 30, 2023 are as follows:       Originally Reported     Adjustment     Restated       Three Months Ended June 30, 2023     Three Months Ended June 30, 2023     Three Months Ended June 30, 2023   Research and development   $ 8,991,250     $ (734,914 )   $ 8,256,336   Total operating expenses     12,070,551       (734,914 )     11,335,637   Loss from operations     (12,070,551 )     734,914       (11,335,637 ) Net loss     (12,442,862 )     734,914       (11,707,948 ) Basic and diluted   $ (0.55 )   $ 0.03     $ (0.52 )       Originally Reported     Adjustment     Restated       Six Months Ended June 30, 2023     Six Months Ended June 30, 2023     Six Months Ended June 30, 2023   Research and development   $ 14,226,249     $ (485,768 )   $ 13,740,481   Total operating expenses     18,806,104       (485,768 )     18,320,336   Loss from operations     (18,806,104 )     485,768       (18,320,336 ) Net loss     (19,045,405 )     485,768       (18,559,637 ) Basic and diluted   $ (0.86 )   $ 0.02     $ (0.84 )   While the adjustments changed net loss, and accrued expenses and other current liabilities line items in the condensed consolidated cash flow statement, they did not have an impact on total net cash used in operating activities. Further, there was no impact on cash flows from investing or cash flows from financing activities.   As previously disclosed in Note 10, “Quarterly Financial Data (Unaudited and Restated)”, to the Consolidated Financial Statements included in the Company’s 2023 Form 10-K, the restated line items of the consolidated cash flow statement for the six months ended June 30, 2023 are as follows:       Originally Reported     Adjustment     Restated       Six Months Ended June 30, 2023     Six Months Ended June 30, 2023     Six Months Ended June 30, 2023   Cash flows from operating activities                         Net loss   $ (19,045,405 )   $ 485,768     $ (18,559,637 ) Adjustments to reconcile net loss to net cash used in operating activities                         Changes in operating assets and liabilities                         Accrued expenses and other current liabilities     3,817,989       (485,768 )     3,332,221   Net cash used in operating activities   $ (13,268,624 )   $ —     $ (13,268,624 )   Liquidity and going concern   The Company has incurred losses since inception and as of June 30, 2024 the Company had a working capital deficit of approximately $6.7 million, an accumulated deficit of $149.6 million and cash and cash equivalents on hand of approximately $6.2 million. The Company’s net loss for the three months ended June 30, 2024 and 2023, was approximately $7.9 million and $11.7 million, respectively. The Company's net loss for the for the six months ended June 30, 2024 and 2023, was approximately $15.3 million and $18.6 million, respectively. The Company expects to incur significant expenses and increased operating losses for the next several years. The Company expects its expenses to increase in connection with its ongoing activities to research, develop and commercialize its product candidates. The Company will need to generate significant revenues to achieve profitability, and it may never do so.   The Company’s current cash on hand is not sufficient to satisfy its operating cash needs for the 12 months from the filing of this Quarterly Report on Form 10-Q. The Company believes that it has adequate cash on hand to cover anticipated outlays into the third quarter of fiscal year 2024, but will need additional fundraising activities and cash on hand during the third quarter of fiscal year 2024. These conditions raise substantial doubt regarding the Company’s ability to continue as a going concern for a period of one year after the date the financial statements are issued. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our clinical development efforts. The Company will seek to fund its operations through public or private equity or debt financings or other sources, which may include collaborations with third parties. In May 2024 the Company raised capital through a registered financial offering (Note 4). Adequate additional financing may not be available to the Company on acceptable terms, or at all. Should the Company be unable to raise sufficient additional capital, the Company may be required to undertake cost-cutting measures including delaying or discontinuing certain clinical activities. These circumstances raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued.   Use of estimates   The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of expenses during the reporting periods covered by the financial statements and accompanying notes. Significant areas requiring the use of management estimates include, but are not limited to, accounting for clinical trial costs, assumptions used to calculate the fair value of stock-based compensation, assumptions used to calculate the fair value of warrants, deferred taxes, and related valuation allowances. Actual results could differ materially from such estimates under different assumptions or circumstances.   Concentration of credit risk and other risks and uncertainties   Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents. Substantially, all the Company’s cash and cash equivalents are held in demand deposit and money market funds at three financial institutions. Deposits in financial institutions may, from time to time, exceed federally insured limits. Amounts held in demand deposit in excess of federally insured limits, totaled $915,028 and $786,971 as of June 30, 2024 and December 31, 2023, respectively. The Company has not experienced any losses on its deposits of cash.   The Company is subject to all of the risks inherent in an early-stage company developing new pharmaceutical products. These risks include, but are not limited to, limited management resources, dependence upon medical acceptance of the product in development, regulatory approvals, successful clinical trials, availability and willingness of patients to participate in human trials, and competition in the pharmaceutical industry. The Company’s operating results may be materially affected by the foregoing factors.   Cash and cash equivalents   As of June 30, 2024, and December 31, 2023, the Company’s cash was maintained in demand deposit forms at three financial institutions. The Company considers any highly liquid investments, such as money market funds, with an original maturity of three months or less to be cash and cash equivalents.   The components of cash and cash equivalents were as follows:       As of June 30, 2024     As of December 31, 2023   Cash on deposit   $ 1,251,654     $ 1,155,636   Money market funds (cash equivalents)     4,926,526       22,211,820   Cash and cash equivalents   $ 6,178,180     $ 23,367,456     Fair Value Measurements   Accounting Standards Codification ("ASC") 820, Fair Value Measurements ("ASC 820"), defines fair value, establishes a framework for measuring fair value in GAAP and expands disclosures about fair value measurements. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC 820 establishes a fair value hierarchy that distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3).   The three levels of the fair value hierarchy under ASC 820 are described below:     • Level 1 - Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.     • Level 2 - Directly or indirectly observable inputs as of the reporting date through correlation with market data, including quoted prices for similar assets and liabilities in active markets and quoted prices in markets that are not active. Level 2 also includes assets and liabilities that are valued using models or other pricing methodologies that do not require significant judgment since the input assumptions used in the models, such as interest rates and volatility factors, are corroborated by readily observable data from actively quoted markets for substantially the full term of the financial instrument.     • Level 3 - Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions.   In determining the fair value of all warrants, excluding the private-placement warrants (see Note 7), the Company utilizes the Black-Scholes model using assumptions regarding volatility of the Company's common share price, expected term of the warrants, expected divided rate, and risk-free interest rates. In determining the fair value of the private placement warrants, the Company utilizes a Lattice model using assumptions regarding volatility implied by public warrant market price, expected term of the warrants, expected dividend rate, and risk-free interest rates. Due to their short maturities, the carrying amounts for cash and cash equivalents, prepaid clinical trial costs, prepaid expenses and other current assets, accounts payable, accrued clinical expenses, accrued compensation, short-term debt, and other accrued liabilities approximate their fair value.   Short-term debt   In January 2024, the Company obtained financing for certain Director and Officer liability insurance policy premiums. The governing agreement assigns the lender a first priority lien on and security interest in the financed policies and any additional premium required in the financed policies.   The total premiums, taxes, and fees financed was $518,750, of which of which a principal of $415,000 was financed after accounting for the up-front payment made. The financing arrangement has an annual percentage interest rate of 7.99% and a term of 12 months, with payments, inclusive of interest, payable on a monthly basis.   New accounting pronouncements not yet adopted   In November 2023, the FASB issued Accounting Standards Update ("ASU") 2023-07, Segment Reporting (Topic 280), Improvements to Reportable Segment Disclosures. This Update improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this Update are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption of the amendments is permitted. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.   In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740), Improvements to Income Tax Disclosures. This Update enhances the transparency and usefulness of income tax disclosures, particularly in the rate reconciliation table and disclosures about income taxes paid. The guidance also eliminates certain existing requirements related to uncertain tax positions and unrecognized deferred tax liabilities. The amendments in this Update are effective for annual periods beginning after December 15, 2024. Early adoption of the amendments is permitted for annual financial statements that have not yet been issued. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.

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Note 3 - Loss Per Share	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Earnings Per Share [Text Block]	3.   LOSS PER SHARE   Basic and diluted net loss per share is computed by dividing the net loss for the period by the weighted average number of common stock outstanding during the period. Diluted loss per share includes potentially dilutive securities such as stock options, warrants to purchase common stock (excluding warrants that are exercisable for $0.0001 per warrant), and shares contingently issuable for earnout unless the result of inclusion would be anti-dilutive. These securities have been excluded from the calculation of diluted net loss per shares for the three and six months ended June 30, 2024 and 2023, because all such securities are anti-dilutive for all periods presented.   The components of basic and diluted net loss per share were as follows:       Three Months Ended June 30,     Six Months Ended June 30,       2024     2023 (as restated)     2024     2023 (as restated)   Numerator:                                 Net loss   $ (7,859,919 )   $ (11,707,948 )   $ (15,293,527 )   $ (18,559,637 ) Denominator:                                 Weighted-average common shares outstanding – basic and diluted     30,555,012       22,434,781       30,221,168       22,135,850   Net loss per share – basic and diluted   $ (0.26 )   $ (0.52 )   $ (0.51 )   $ (0.84 )   The following table summarizes the Company’s potentially dilutive securities, in common share equivalents, which have been excluded from the calculation of dilutive loss per share as their effect would be anti-dilutive:       Three Months Ended June 30,     Six Months Ended June 30,       2024     2023     2024     2023   Shares issuable upon exercise of stock options     1,505,572       1,547,774       1,505,572       1,547,774   Shares issuable upon exercise of warrants to purchase common stock (excluding warrants that are exercisable for $0.0001 per warrant)     22,782,603       15,030,209       22,782,603       15,030,209   Shares contingently issuable for earnout     —       1,000,000       —       1,000,000         24,288,175       17,577,983       24,288,175       17,577,983     The diluted loss per share computation equals basic loss per share for the three and six months ended June 30, 2024 and 2023 because the Company had a net loss and the impact of the assumed exercise of stock options, certain warrants, and shares contingently issuable for earnout would have been anti-dilutive.

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Note 4 - Warrants	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Warrants [Text Block]	4.   WARRANTS   Warrant activity during the six months ended June 30, 2024, was as follows:       Number of Warrants     Weighted Average Exercise Price     Total Intrinsic Value     Weighted Average Remaining Contractual Life (in years)   Outstanding as of December 31, 2023     25,067,643     $ 6.03     $ 29,686,123       3.1   Issued     1,898,734       1.46       —       5.0   Outstanding as of June 30, 2024     26,966,377     $ 5.52     $ 2,519,822       2.8     May 2024 Registered Direct Offering   On May 28, 2024, the Company entered into a securities purchase agreement (the "Purchase Agreement") pursuant to which the Company sold, in a registered direct offering (the “Offering”) priced at the market under Nasdaq rules which closed on May 29, 2024, an aggregate of (i) 1,898,734 shares of its common stock, and (ii) warrants (the “Warrants”) exercisable for an aggregate of up to 1,898,734 shares of its common stock. The public offering price for each share of common stock and accompanying Warrant to purchase one share of common stock was $1.58. The Warrants have a term of 5 years and expire on May 29, 2029. The net proceeds to the Company from the Offering were $2.8 million, after deducting placement offering costs, agent fees and expenses and other offering expenses payable by the Company, of $0.4 million.   The Company evaluated the Warrants in accordance with the guidance at ASC 480, Distinguishing Liabilities from Equity and ASC 815-40, Derivatives and Hedging, and determined that they should be classified as equity instruments, with no recurring fair value measurement required. The Warrants are indexed to the Company’s common stock and are required to be settled through physical settlement or net share settlement, if exercised. Accordingly, the Warrants were recorded at their grant date fair value with no subsequent remeasurement.   The fair value of the Warrants was determined utilizing a Black-Scholes model, considering all relevant assumptions current at the date of issuance (i.e., Company stock price of $1.34, exercise price of $1.46, expected term of 5 years, volatility of 93%, risk-free interest rate of 4.6%, and expected dividend rate of 0%). Refer to Note 2 for further detail regarding how assumptions were determined. The grant date relative fair value of the Warrants was estimated to be approximately $1.1 million to additional paid-in capital in the condensed consolidated balance sheet as the warrants were determined to be equity classified, with the corresponding debit as an issuance cost of the related equity offering.     Accounting for Warrant Modification   In connection with the Offering, on May 28, 2024, the Company entered into a warrant amendment agreement with the purchaser party to the Purchase Agreement, pursuant to which the Company agreed to amend the purchaser’s existing warrants to purchase 1,365,854 shares of common stock at an exercise price of $5.00 per share issued in November 2023 (the “Existing Warrants”) in consideration for such purchaser party’s participation and purchase of approximately $3.0 million of securities in the Offering and the payment of $0.2 million to (i) lower the exercise price of the Existing Warrants to $1.455 per share and (ii) amend the expiration date of the Existing Warrants to five years following the closing of the Offering, effective upon the closing of the Offering on May 29, 2024.   ASC Topic 480, Distinguishing Liabilities from Equity (“ASC 480”) and ASC Topic 815, Derivatives and Hedging ("ASC 815") require issuers to account for modifications or exchanges of freestanding equity-classified written call options (e.g., warrants) that remain equity classified after the modification or exchange based on the economic substance of the modification or exchange. Pursuant to ASC 480 and ASC 815, the Company accounts for modifications of equity-classified warrant agreements by recording any increase in fair value of the modified equity-classified warrant as an equity issuance cost that reduces additional paid-in capital.   The following assumptions were used to value the modification of the warrants immediately before the modification and immediately after the modification:       Immediately before the modification     Immediately after the modification   Risk-free interest rate     4.70 %     4.60 % Remaining expected term     4.5       5.0   Expected volatility     97.00 %     93.00 % Stock price on valuation date   $ 1.34     $ 1.34   Exercise price   $ 5.00     $ 1.46   Expected dividend rate     — %     — %

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Note 5 - Stockholders' Equity (Deficit), Stock Option Plans, and Stock-based Compensation	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Share-Based Payment Arrangement [Text Block]	5. STOCKHOLDERS' EQUITY (DEFICIT), STOCK OPTION PLANS, AND STOCK-BASED COMPENSATION   Our authorized capital stock consists of:     • 115,000,000 shares of common stock, par value $0.0001 per share; and     • 10,000,000 shares of preferred stock, par value $0.0001 per share.   As of June 30, 2024 there were 29,817,294 shares of our common stock outstanding, and no shares of preferred stock outstanding.   On May 28, 2024, the Company entered into the Purchase Agreement for the sale of shares of common stock and the warrants. Refer to Note 4, Warrants, for additional details.   As of June 30, 2024, the Company has shares of common stock reserved for future issuance as follows:   Shares underlying outstanding warrants     24,751,368   Shares reserved for future issuance under the 2020 Equity Incentive Plan     3,871,121   Stock options outstanding     1,505,572   Total common stock reserved for future issuance     30,128,061     2006 and 2020 Equity Incentive Plans   As of December 31, 2023, there were an aggregate of 1,004,263 shares of common stock available for issuance under the 2020 Equity Incentive Plan, subject to equitable adjustment in the event of stock splits and other capital changes (the “Share Reserve”). Following the December 31, 2023 balance sheet date, in accordance with the “evergreen” provision in our 2020 Equity Incentive Plan (the "Evergreen Provision"), an additional 2,791,856 shares were automatically made available for issuance on the first day of 2024, which represents 10% of the number of shares of the Company’s common stock outstanding on December 31, 2023. As a result, as of June 30, 2024, the Share Reserve available for future awards under the 2020 Equity Incentive Plan stood at 3,871,121 shares, after accounting for the above described 2024 Evergreen Increase and options forfeited in the first and second quarters of 2024.   As of June 30, 2024, the Share Reserve related to previously issued and outstanding awards under the 2006 Equity Incentive Plan stood at 16,747. No new grants of awards are permitted under the 2006 Equity Incentive Plan.   Stock-Based Compensation Expense   The Company records stock-based compensation expense based on the fair value of stock options granted to employees, non-employee consultants and non-employee directors. During the three months ended June 30, 2024 and 2023, the Company recorded stock-based compensation expense of approximately $0.4 million and $2.6 million, respectively. During the six months ended June 30, 2024 and 2023, the Company recorded stock-based compensation expense of approximately $0.7 million and $2.7 million, respectively. As of June 30, 2024 the Company had unrecognized stock-based compensation expense of $2.4 million, which is expected to be recognized over a weighted-average period of 2.0 years.   There were no options granted during the six months ended June 30, 2024.   Activity under the stock plans for the six months ended June 30, 2024 is as follows:       Shares Available for Grant     Number of Options Outstanding     Weighted Average Exercise price per share     Weighted Average Remaining Contractual Term in Years     Aggregate Intrinsic Value   Balance, December 31, 2023     1,004,263       1,580,574     $ 6.51       9.11     $ 300,969   Expired     75,002       (75,002 )     6.74                   Evergreen plan increase     2,791,856                                   Balance, June 30, 2024     3,871,121       1,505,572     $ 6.49       8.61     $ 2,850   Options exercisable at June 30, 2024             915,196     $ 6.80       8.42     $ 2,492     For the three months ended June 30, 2024 and 2023, the amount of stock-based compensation expense included within research and development and general and administrative expenses was as follows:       Three months ended, June 30,       2024     2023   Research and development   $ 184,883     $ 992,473   General and administrative     174,110       1,628,346   Total stock-based compensation expense   $ 358,993     $ 2,620,819     For the six months ended June 30, 2024 and 2023, the amount of stock-based compensation expense included within research and development and general and administrative expenses was as follows:       Six months ended, June 30,       2024     2023   Research and development   $ 379,779     $ 1,033,867   General and administrative     348,289       1,638,479   Total stock-based compensation expense   $ 728,068     $ 2,672,346

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Note 6 - Commitments and Contingencies	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	6.   COMMITMENTS AND CONTINGENCIES   Clinical trials   Since 2010, the Company has entered into multiple clinical trial agreements with medical institutions in the United States, Europe and Asia for the purpose of enrolling patients into various clinical trials. The agreements are substantially similar by trial and include a detailed listing of the clinical trial services for which the Company will pay, how much will be paid for each service, a set-up charge (if any), Investigational Review Board fees, contractual term, and other provisions. The clinical trial services provided by each site generally include the screening of prospective patients and, for those patients to be enrolled in the study, administration of the Company’s investigation drug according to the trial protocol, any required hospitalization, ancillary medical supplies, and 2-week patient follow-up. Further, each agreement requires the Company to indemnify each respective clinical site against any and all liability, loss, or damage it may suffer as a result of third-party claims; the Company maintains product liability insurance in conjunction with this indemnification. The agreements may be terminated upon 30 days’ written notice, subject to conditions of paying all liabilities incurred through the date of termination. Additionally, with each screened patient, the Company incurs expense with other entities engaged to provide independent review of patient medical records.   As part of the Company's agreement with one of its clinical research organizations, the Company is required to maintain a 7% upfront float for fees related to expenses incurred in clinical studies. When the float has depleted to 15% (i.e. 85% of the float has been used) the Company will receive an invoice to replenish the float up to 7% of the remaining estimated budget for the studies. As of December 31, 2023 and June 30, 2024, the Company had no remaining prepaid float balance.   Indemnification   From time to time, in its normal course of business, the Company may indemnify other parties, with whom it enters into contractual relationships, including lessors and parties to other transactions with the Company. The Company may agree to hold other parties harmless against specific losses, such as those that could arise from a breach of representation, covenant or third-party infringement claims. It may not be possible to determine the maximum potential amount of liability under such indemnification obligations due to the unique facts and circumstances that are likely to be involved in each particular claim and indemnification provision. Historically, there have been no such indemnification claims. The Company has also indemnified its directors and executive officers, to the extent legally permissible, against all liabilities reasonably incurred in connection with any action in which such individual may be involved by reason of such individual being or having been a director or executive officer.   Operating Leases   During the period covered by these condensed consolidated financial statements, the Company had two leases. The first was a twelve-month lease on its former corporate office located at 19925 Stevens Creek Blvd., Suite 100, Cupertino, CA 95014. The monthly lease payment was approximately $1,447 and the lease was renewed in February 2022 and again on February 1, 2023, for another 12-month term. This lease terminated on January 31, 2024. The second lease was for a new corporate office located at 10080 N. Wolfe Road, Suite SW3-200, Cupertino, CA 95014. The monthly lease payment was approximately $4,300 and the lease was entered into beginning December 1, 2023 for a 12-month term. The operating lease cost on these leases for the three months ended June 30, 2024 and 2023 was approximately $13,100 and $5,200, respectively. The operating lease cost on these leases for the six months ended June 30, 2024 and 2023 was approximately $24,300 and $10,200, respectively.   Litigation   The Company is not currently a party to any material legal proceedings and is not aware of any pending or threatened claims. From time to time, the Company may be subject to various legal proceedings and claims that arise in the ordinary course of its business activities.

v3.24.2.u1

Note 7 - Fair Value Measurements	6 Months Ended
	Jun. 30, 2024
Notes to Financial Statements
Fair Value Disclosures [Text Block]	7. FAIR VALUE MEASUREMENTS   The following tables provide a summary of the assets and liabilities that are required to be measured at fair value on a recurring basis and where they are classified within the fair value hierarchy as of June 30, 2024 and December 31, 2023:       June 30, 2024       Level 1     Level 2     Level 3     Total   Assets:                                 Money market funds (cash equivalents)   $ 4,929,526     $ —     $ —     $ 4,929,526   Total assets measured and recorded at fair value   $ 4,929,526     $ —     $ —     $ 4,929,526   Liabilities:                                 Warrant liabilities   $ —     $ —     $ 150,205     $ 150,205   Total liabilities measured and recorded at fair value   $ —     $ —     $ 150,205     $ 150,205         December 31, 2023       Level 1     Level 2     Level 3     Total   Assets:                                 Money market funds (cash equivalents)   $ 22,211,820     $ —     $ —     $ 22,211,820   Total assets measured and recorded at fair value   $ 22,211,820     $ —     $ —     $ 22,211,820   Liabilities:                                 Warrant liabilities   $ —     $ —     $ 806,655     $ 806,655   Total liabilities measured and recorded at fair value   $ —     $ —     $ 806,655     $ 806,655     The following table summarizes the changes in the fair value of the warrant liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):       Three Months Ended June 30,     Six Months Ended June 30,       2024     2023     2024     2023   Balance, beginning of period   $ 350,478     $ 556,313     $ 806,655     $ 567,439   Change in fair value of warrant liabilities     (200,273 )     456,177       (656,450 )     445,051   Balance, end of period   $ 150,205     $ 1,012,490     $ 150,205     $ 1,012,490     In prior years, the Company issued warrants to purchase 556,313 shares of common stock in a private placement (the "Private Warrants") and classified the warrants as derivative liabilites, pursuant to ASC 815, as the warrants have an exercise price that is subject to potential adjustment, with subsequent changes in their fair values to be recognized in the condensed consolidated statement of operations at each reporting date. The Company calculated the fair value of the Private Warrants as of June 30, 2024 and December 31, 2023 as $150,205 and $806,655, respectively, using a Lattice model. The key inputs used in the Lattice calculation were the following:       June 30, 2024     December 31, 2023   Risk-free interest rate     4.92 %     4.25 % Remaining expected term of Private warrants     1.46       1.96   Expected volatility (1)     144.50 %     89.00 % Stock price on valuation date   $ 1.28     $ 5.15   Exercise price   $ 11.50     $ 11.50   Expected dividend rate     — %     — % (1) Based on volatility implied by guideline company publicly traded warrant market prices.

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Insider Trading Arrangements	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]		ITEM 5. OTHER INFORMATION.   Rule 10b5-1 Trading Arrangements and Non-Rule 10b5-1 Trading Arrangements   During the fiscal quarter ended June 30, 2024, none of our officers or directors, as those terms are defined in Rule 16a-1(f), adopted or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Item 408 of Regulation S-K.
Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false

v3.24.2.u1

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2024
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of presentation   The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 8 of Regulation S-X. Certain footnotes and other financial information normally required by accounting principles generally accepted in the United States of America, or GAAP, have been condensed or omitted in accordance with such rules and regulations. In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as our annual consolidated financial statements and notes thereto and include all adjustments, consisting of normal recurring items, considered necessary for the fair presentation. The operating results for the three and six months ended June 30, 2024 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2024.   The unaudited condensed consolidated balance sheet as of December 31, 2023, has been derived from our audited financial statements at that date but does not include all disclosures and financial information required by GAAP for complete financial statements. The information included in the quarterly report on Form 10-Q should be read in conjunction with our consolidated financial statements and notes thereto for the year ended December 31, 2023, which were included in our annual report on Form 10-K, as filed with the Securities and Exchange Commission on April 15, 2024.
Reclassification, Comparability Adjustment [Policy Text Block]	Reclassifications   Certain amounts in the prior year’s consolidated financial statements, as of December 31, 2023 have been reclassified to conform to the current period's presentation. This involved disclosing separately, prepaid clinical trial costs from the prepaid expenses and other current assets balance, which were previously disclosed in the aggregate. This reclassification had no effect on the Company’s loss from operations, net loss, or net loss per share.
Consolidation, Policy [Policy Text Block]	Principles of consolidation   The accompanying condensed consolidated financial statements include the accounts of the Reviva Pharmaceuticals Holdings, Inc. and its wholly owned subsidiary Reviva Pharmaceuticals, India Pvt Ltd. The Company’s subsidiary’s functional currency is the U.S. dollar. The Company recognizes a foreign currency gain or loss each reporting period, on translation of its foreign subsidiary's financial information on consolidation. Any such foreign currency gain or loss is recognized as part of other expense, net, on the condensed consolidated statement of operations. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America. All transactions and balances between the parent and its subsidiary have been eliminated in consolidation.
Error Correction, Policy [Policy Text Block]	Previously-disclosed restatement of previously reported interim condensed consolidated quarterly financial statements   The interim consolidated financial statements include corrections to the three and six months ended June 30, 2023, which corrections were previously presented in the audited consolidated financial statements and notes thereto, including specifically Note 10, “Quarterly Financial Data (Unaudited and Restated)”, for the fiscal year ended December 31, 2023, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as filed with the SEC on April 15, 2024 (sometimes hereinafter referred to as the “2023 Form 10-K”).   As previously reported in Item 4.02(a) of the Company’s Current Report on Form 8-K as filed with the SEC on April 15, 2024, and in the Company’s 2023 Form 10-K, on April 12, 2024, the audit committee (the “audit committee”) of the board of directors of the Company, after meeting with management, concluded that the Company’s previously issued financial statements for the fiscal year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, the interim financial statements for the quarterly period ended September 30, 2022 included in its Quarterly Report on Form 10-Q, and each of the interim financial statements for the quarterly periods in fiscal 2023 included in its Quarterly Reports on Form 10-Q (cumulatively, the “Restatement Periods”) should be restated to correct historical errors related principally to the timing of recognition of the Company’s estimated accrual of certain research and development expenses.   The need for the restatement arose out of the results of certain financial analysis the Company performed in the course of preparing its fiscal year-end 2023 consolidated financial statements. Principally, the Company completed a detailed lookback analysis to compare certain estimated accrued clinical trial expenses, specifically investigator fees, from one contract research organization to its actual clinical trial expenses that were incurred for the respective periods for that contract research organization during the Restatement Periods based on review of historical invoices. In the course of its analysis of the actual information gathered through the lookback process, the Company detected differences between the estimated accrued amounts of those clinical trial expenses and the actual expenses recorded due primarily to the Company’s failure to properly review and evaluate expenses incurred in those clinical trial contracts resulting in the Company not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received. In addition, the Company determined that an effective process for evaluating the completeness of the research and development expense accrual for investigator fees and related costs, for that contract research organization, was necessary. This included estimated patient site visits not yet reported, average site visit costs and average delay in site invoicing. This provides the Company with an effective estimate of the costs incurred as there can be a lag between receiving an invoice for the services provided from that contract research organization. Management and the audit committee of the Company’s board of directors concluded that, in the ordinary course of closing its financial books and records, the Company previously excluded certain clinical trial expenses and associated accruals from the appropriate periods as required under applicable accounting guidelines. Therefore, the Company misstated research and development expenses, and accrued clinical expenses for the three and six months ended June 30, 2023.   As previously disclosed, the Company misstated research and development expenses and associated accrued liabilities during the Restatement Periods. Also as previously disclosed, the Company principally attributes the errors to a material weakness in its internal control activities due to a failure in the design and implementation of its controls to review clinical trial expenses, including the evaluation of the terms of clinical trial contracts. Specifically, the Company failed to properly review and evaluate progress of expenses incurred in clinical trial contracts resulting in the Company not properly accruing for clinical trial expenses that were incurred but for which invoices were not yet received. These material weaknesses were previously disclosed in Item II, Part 9A of the Company’s 2023 Form 10-K, and are disclosed in Part I, Item 4 of this Quarterly Report on Form 10-Q. The Company has commenced procedures to remediate the material weaknesses. However, these material weaknesses will not be considered remediated until the applicable remedial actions have been fully implemented and the Company has concluded that these controls are operating effectively for a sufficient period of time.   These condensed consolidated financial statements and the corresponding discussion included in Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, are reflective of the restatement adjustments for the three and six months ended June 30, 2023, as previously presented in Note 10 to the Company’s consolidated financial statements included in the 2023 Form 10-K.   As previously disclosed in Note 10, “Quarterly Financial Data (Unaudited and Restated)”, to the Consolidated Financial Statements included in the Company’s 2023 Form 10-K, the restated line items of the consolidated statement operations for three and six months ended June 30, 2023 are as follows:       Originally Reported     Adjustment     Restated       Three Months Ended June 30, 2023     Three Months Ended June 30, 2023     Three Months Ended June 30, 2023   Research and development   $ 8,991,250     $ (734,914 )   $ 8,256,336   Total operating expenses     12,070,551       (734,914 )     11,335,637   Loss from operations     (12,070,551 )     734,914       (11,335,637 ) Net loss     (12,442,862 )     734,914       (11,707,948 ) Basic and diluted   $ (0.55 )   $ 0.03     $ (0.52 )       Originally Reported     Adjustment     Restated       Six Months Ended June 30, 2023     Six Months Ended June 30, 2023     Six Months Ended June 30, 2023   Research and development   $ 14,226,249     $ (485,768 )   $ 13,740,481   Total operating expenses     18,806,104       (485,768 )     18,320,336   Loss from operations     (18,806,104 )     485,768       (18,320,336 ) Net loss     (19,045,405 )     485,768       (18,559,637 ) Basic and diluted   $ (0.86 )   $ 0.02     $ (0.84 )   While the adjustments changed net loss, and accrued expenses and other current liabilities line items in the condensed consolidated cash flow statement, they did not have an impact on total net cash used in operating activities. Further, there was no impact on cash flows from investing or cash flows from financing activities.   As previously disclosed in Note 10, “Quarterly Financial Data (Unaudited and Restated)”, to the Consolidated Financial Statements included in the Company’s 2023 Form 10-K, the restated line items of the consolidated cash flow statement for the six months ended June 30, 2023 are as follows:       Originally Reported     Adjustment     Restated       Six Months Ended June 30, 2023     Six Months Ended June 30, 2023     Six Months Ended June 30, 2023   Cash flows from operating activities                         Net loss   $ (19,045,405 )   $ 485,768     $ (18,559,637 ) Adjustments to reconcile net loss to net cash used in operating activities                         Changes in operating assets and liabilities                         Accrued expenses and other current liabilities     3,817,989       (485,768 )     3,332,221   Net cash used in operating activities   $ (13,268,624 )   $ —     $ (13,268,624 )
Going Concern [Policy Text Block]	Liquidity and going concern   The Company has incurred losses since inception and as of June 30, 2024 the Company had a working capital deficit of approximately $6.7 million, an accumulated deficit of $149.6 million and cash and cash equivalents on hand of approximately $6.2 million. The Company’s net loss for the three months ended June 30, 2024 and 2023, was approximately $7.9 million and $11.7 million, respectively. The Company's net loss for the for the six months ended June 30, 2024 and 2023, was approximately $15.3 million and $18.6 million, respectively. The Company expects to incur significant expenses and increased operating losses for the next several years. The Company expects its expenses to increase in connection with its ongoing activities to research, develop and commercialize its product candidates. The Company will need to generate significant revenues to achieve profitability, and it may never do so.   The Company’s current cash on hand is not sufficient to satisfy its operating cash needs for the 12 months from the filing of this Quarterly Report on Form 10-Q. The Company believes that it has adequate cash on hand to cover anticipated outlays into the third quarter of fiscal year 2024, but will need additional fundraising activities and cash on hand during the third quarter of fiscal year 2024. These conditions raise substantial doubt regarding the Company’s ability to continue as a going concern for a period of one year after the date the financial statements are issued. The amount and timing of our future funding requirements will depend on many factors, including the pace and results of our clinical development efforts. The Company will seek to fund its operations through public or private equity or debt financings or other sources, which may include collaborations with third parties. In May 2024 the Company raised capital through a registered financial offering (Note 4). Adequate additional financing may not be available to the Company on acceptable terms, or at all. Should the Company be unable to raise sufficient additional capital, the Company may be required to undertake cost-cutting measures including delaying or discontinuing certain clinical activities. These circumstances raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued.
Use of Estimates, Policy [Policy Text Block]	Use of estimates   The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of expenses during the reporting periods covered by the financial statements and accompanying notes. Significant areas requiring the use of management estimates include, but are not limited to, accounting for clinical trial costs, assumptions used to calculate the fair value of stock-based compensation, assumptions used to calculate the fair value of warrants, deferred taxes, and related valuation allowances. Actual results could differ materially from such estimates under different assumptions or circumstances.
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of credit risk and other risks and uncertainties   Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash and cash equivalents. Substantially, all the Company’s cash and cash equivalents are held in demand deposit and money market funds at three financial institutions. Deposits in financial institutions may, from time to time, exceed federally insured limits. Amounts held in demand deposit in excess of federally insured limits, totaled $915,028 and $786,971 as of June 30, 2024 and December 31, 2023, respectively. The Company has not experienced any losses on its deposits of cash.   The Company is subject to all of the risks inherent in an early-stage company developing new pharmaceutical products. These risks include, but are not limited to, limited management resources, dependence upon medical acceptance of the product in development, regulatory approvals, successful clinical trials, availability and willingness of patients to participate in human trials, and competition in the pharmaceutical industry. The Company’s operating results may be materially affected by the foregoing factors.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and cash equivalents   As of June 30, 2024, and December 31, 2023, the Company’s cash was maintained in demand deposit forms at three financial institutions. The Company considers any highly liquid investments, such as money market funds, with an original maturity of three months or less to be cash and cash equivalents.   The components of cash and cash equivalents were as follows:       As of June 30, 2024     As of December 31, 2023   Cash on deposit   $ 1,251,654     $ 1,155,636   Money market funds (cash equivalents)     4,926,526       22,211,820   Cash and cash equivalents   $ 6,178,180     $ 23,367,456
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value Measurements   Accounting Standards Codification ("ASC") 820, Fair Value Measurements ("ASC 820"), defines fair value, establishes a framework for measuring fair value in GAAP and expands disclosures about fair value measurements. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. ASC 820 establishes a fair value hierarchy that distinguishes between (1) market participant assumptions developed based on market data obtained from independent sources (observable inputs) and (2) an entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances (unobservable inputs). The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3).   The three levels of the fair value hierarchy under ASC 820 are described below:     • Level 1 - Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.     • Level 2 - Directly or indirectly observable inputs as of the reporting date through correlation with market data, including quoted prices for similar assets and liabilities in active markets and quoted prices in markets that are not active. Level 2 also includes assets and liabilities that are valued using models or other pricing methodologies that do not require significant judgment since the input assumptions used in the models, such as interest rates and volatility factors, are corroborated by readily observable data from actively quoted markets for substantially the full term of the financial instrument.     • Level 3 - Unobservable inputs that are supported by little or no market activity and reflect the use of significant management judgment. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions.   In determining the fair value of all warrants, excluding the private-placement warrants (see Note 7), the Company utilizes the Black-Scholes model using assumptions regarding volatility of the Company's common share price, expected term of the warrants, expected divided rate, and risk-free interest rates. In determining the fair value of the private placement warrants, the Company utilizes a Lattice model using assumptions regarding volatility implied by public warrant market price, expected term of the warrants, expected dividend rate, and risk-free interest rates. Due to their short maturities, the carrying amounts for cash and cash equivalents, prepaid clinical trial costs, prepaid expenses and other current assets, accounts payable, accrued clinical expenses, accrued compensation, short-term debt, and other accrued liabilities approximate their fair value.
Debt, Policy [Policy Text Block]	Short-term debt   In January 2024, the Company obtained financing for certain Director and Officer liability insurance policy premiums. The governing agreement assigns the lender a first priority lien on and security interest in the financed policies and any additional premium required in the financed policies.   The total premiums, taxes, and fees financed was $518,750, of which of which a principal of $415,000 was financed after accounting for the up-front payment made. The financing arrangement has an annual percentage interest rate of 7.99% and a term of 12 months, with payments, inclusive of interest, payable on a monthly basis.
New Accounting Pronouncements, Policy [Policy Text Block]	New accounting pronouncements not yet adopted   In November 2023, the FASB issued Accounting Standards Update ("ASU") 2023-07, Segment Reporting (Topic 280), Improvements to Reportable Segment Disclosures. This Update improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this Update are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. Early adoption of the amendments is permitted. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.   In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740), Improvements to Income Tax Disclosures. This Update enhances the transparency and usefulness of income tax disclosures, particularly in the rate reconciliation table and disclosures about income taxes paid. The guidance also eliminates certain existing requirements related to uncertain tax positions and unrecognized deferred tax liabilities. The amendments in this Update are effective for annual periods beginning after December 15, 2024. Early adoption of the amendments is permitted for annual financial statements that have not yet been issued. The Company is in the process of evaluating the impact of this new guidance on its consolidated financial statements.

v3.24.2.u1

Note 2 - Summary of Significant Accounting Policies and Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]	Originally Reported     Adjustment     Restated       Three Months Ended June 30, 2023     Three Months Ended June 30, 2023     Three Months Ended June 30, 2023   Research and development   $ 8,991,250     $ (734,914 )   $ 8,256,336   Total operating expenses     12,070,551       (734,914 )     11,335,637   Loss from operations     (12,070,551 )     734,914       (11,335,637 ) Net loss     (12,442,862 )     734,914       (11,707,948 ) Basic and diluted   $ (0.55 )   $ 0.03     $ (0.52 )     Originally Reported     Adjustment     Restated       Six Months Ended June 30, 2023     Six Months Ended June 30, 2023     Six Months Ended June 30, 2023   Research and development   $ 14,226,249     $ (485,768 )   $ 13,740,481   Total operating expenses     18,806,104       (485,768 )     18,320,336   Loss from operations     (18,806,104 )     485,768       (18,320,336 ) Net loss     (19,045,405 )     485,768       (18,559,637 ) Basic and diluted   $ (0.86 )   $ 0.02     $ (0.84 )     Originally Reported     Adjustment     Restated       Six Months Ended June 30, 2023     Six Months Ended June 30, 2023     Six Months Ended June 30, 2023   Cash flows from operating activities                         Net loss   $ (19,045,405 )   $ 485,768     $ (18,559,637 ) Adjustments to reconcile net loss to net cash used in operating activities                         Changes in operating assets and liabilities                         Accrued expenses and other current liabilities     3,817,989       (485,768 )     3,332,221   Net cash used in operating activities   $ (13,268,624 )   $ —     $ (13,268,624 )
Schedule of Cash and Cash Equivalents [Table Text Block]	As of June 30, 2024     As of December 31, 2023   Cash on deposit   $ 1,251,654     $ 1,155,636   Money market funds (cash equivalents)     4,926,526       22,211,820   Cash and cash equivalents   $ 6,178,180     $ 23,367,456

v3.24.2.u1

Note 3 - Loss Per Share (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended June 30,     Six Months Ended June 30,       2024     2023 (as restated)     2024     2023 (as restated)   Numerator:                                 Net loss   $ (7,859,919 )   $ (11,707,948 )   $ (15,293,527 )   $ (18,559,637 ) Denominator:                                 Weighted-average common shares outstanding – basic and diluted     30,555,012       22,434,781       30,221,168       22,135,850   Net loss per share – basic and diluted   $ (0.26 )   $ (0.52 )   $ (0.51 )   $ (0.84 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Three Months Ended June 30,     Six Months Ended June 30,       2024     2023     2024     2023   Shares issuable upon exercise of stock options     1,505,572       1,547,774       1,505,572       1,547,774   Shares issuable upon exercise of warrants to purchase common stock (excluding warrants that are exercisable for $0.0001 per warrant)     22,782,603       15,030,209       22,782,603       15,030,209   Shares contingently issuable for earnout     —       1,000,000       —       1,000,000         24,288,175       17,577,983       24,288,175       17,577,983

v3.24.2.u1

Note 4 - Warrants (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]	Number of Warrants     Weighted Average Exercise Price     Total Intrinsic Value     Weighted Average Remaining Contractual Life (in years)   Outstanding as of December 31, 2023     25,067,643     $ 6.03     $ 29,686,123       3.1   Issued     1,898,734       1.46       —       5.0   Outstanding as of June 30, 2024     26,966,377     $ 5.52     $ 2,519,822       2.8
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	June 30, 2024     December 31, 2023   Risk-free interest rate     4.92 %     4.25 % Remaining expected term of Private warrants     1.46       1.96   Expected volatility (1)     144.50 %     89.00 % Stock price on valuation date   $ 1.28     $ 5.15   Exercise price   $ 11.50     $ 11.50   Expected dividend rate     — %     — %
Existing Warrants [Member]
Notes Tables
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	Immediately before the modification     Immediately after the modification   Risk-free interest rate     4.70 %     4.60 % Remaining expected term     4.5       5.0   Expected volatility     97.00 %     93.00 % Stock price on valuation date   $ 1.34     $ 1.34   Exercise price   $ 5.00     $ 1.46   Expected dividend rate     — %     — %

v3.24.2.u1

Note 5 - Stockholders' Equity (Deficit), Stock Option Plans, and Stock-based Compensation (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Common Stock, Capital Shares Reserved for Future Issuance [Table Text Block]	Shares underlying outstanding warrants     24,751,368   Shares reserved for future issuance under the 2020 Equity Incentive Plan     3,871,121   Stock options outstanding     1,505,572   Total common stock reserved for future issuance     30,128,061
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	Shares Available for Grant     Number of Options Outstanding     Weighted Average Exercise price per share     Weighted Average Remaining Contractual Term in Years     Aggregate Intrinsic Value   Balance, December 31, 2023     1,004,263       1,580,574     $ 6.51       9.11     $ 300,969   Expired     75,002       (75,002 )     6.74                   Evergreen plan increase     2,791,856                                   Balance, June 30, 2024     3,871,121       1,505,572     $ 6.49       8.61     $ 2,850   Options exercisable at June 30, 2024             915,196     $ 6.80       8.42     $ 2,492
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]	Three months ended, June 30,       2024     2023   Research and development   $ 184,883     $ 992,473   General and administrative     174,110       1,628,346   Total stock-based compensation expense   $ 358,993     $ 2,620,819       Six months ended, June 30,       2024     2023   Research and development   $ 379,779     $ 1,033,867   General and administrative     348,289       1,638,479   Total stock-based compensation expense   $ 728,068     $ 2,672,346

v3.24.2.u1

Note 7 - Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2024
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	June 30, 2024       Level 1     Level 2     Level 3     Total   Assets:                                 Money market funds (cash equivalents)   $ 4,929,526     $ —     $ —     $ 4,929,526   Total assets measured and recorded at fair value   $ 4,929,526     $ —     $ —     $ 4,929,526   Liabilities:                                 Warrant liabilities   $ —     $ —     $ 150,205     $ 150,205   Total liabilities measured and recorded at fair value   $ —     $ —     $ 150,205     $ 150,205       December 31, 2023       Level 1     Level 2     Level 3     Total   Assets:                                 Money market funds (cash equivalents)   $ 22,211,820     $ —     $ —     $ 22,211,820   Total assets measured and recorded at fair value   $ 22,211,820     $ —     $ —     $ 22,211,820   Liabilities:                                 Warrant liabilities   $ —     $ —     $ 806,655     $ 806,655   Total liabilities measured and recorded at fair value   $ —     $ —     $ 806,655     $ 806,655
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	Three Months Ended June 30,     Six Months Ended June 30,       2024     2023     2024     2023   Balance, beginning of period   $ 350,478     $ 556,313     $ 806,655     $ 567,439   Change in fair value of warrant liabilities     (200,273 )     456,177       (656,450 )     445,051   Balance, end of period   $ 150,205     $ 1,012,490     $ 150,205     $ 1,012,490
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	June 30, 2024     December 31, 2023   Risk-free interest rate     4.92 %     4.25 % Remaining expected term of Private warrants     1.46       1.96   Expected volatility (1)     144.50 %     89.00 % Stock price on valuation date   $ 1.28     $ 5.15   Exercise price   $ 11.50     $ 11.50   Expected dividend rate     — %     — %

v3.24.2.u1

Note 2 - Summary of Significant Accounting Policies and Basis of Presentation (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Working Capital	$ 6,700,000		$ 6,700,000
Retained Earnings (Accumulated Deficit)	(149,647,775)		(149,647,775)		$ (134,354,248)
Cash	6,200,000		6,200,000
Net Income (Loss) Attributable to Parent	(7,859,919)	$ (11,707,948)	(15,293,527)	$ (18,559,637)
Cash, Uninsured Amount	915,028		915,028		$ 786,971
Proceeds from Short-Term Debt			415,000	$ 667,500
Financing for Liability Insurance Policy Premiums [Member]
Debt Instrument, Face Amount	$ 518,750		518,750
Proceeds from Short-Term Debt			$ 415,000
Debt Instrument, Interest Rate, Stated Percentage	7.99%		7.99%

v3.24.2.u1

Note 2 - Summary of Significant Accounting Policies and Basis of Presentation - Restatement Adjustments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Research and development	$ 5,584,347	$ 8,256,336	$ 11,368,212	$ 13,740,481
Net loss	(7,859,919)	(11,707,948)	(15,293,527)	(18,559,637)
Total operating expenses	8,129,643	11,335,637	16,051,749	18,320,336
Accrued expenses and other current liabilities			(4,282,778)	3,332,221
Loss from operations	$ (8,129,643)	$ (11,335,637)	(16,051,749)	(18,320,336)
Net cash used in operating activities			$ (20,201,997)	$ (13,268,624)
Basic and diluted (in dollars per share)	$ (0.26)	$ (0.52)	$ (0.51)	$ (0.84)
Previously Reported [Member]
Research and development		$ 8,991,250		$ 14,226,249
Net loss		(12,442,862)		(19,045,405)
Total operating expenses		12,070,551		18,806,104
Accrued expenses and other current liabilities				3,817,989
Loss from operations		$ (12,070,551)		(18,806,104)
Net cash used in operating activities				$ (13,268,624)
Basic and diluted (in dollars per share)		$ (0.55)		$ (0.86)
Revision of Prior Period, Adjustment [Member]
Research and development		$ (734,914)		$ (485,768)
Net loss		734,914		485,768
Total operating expenses		(734,914)		(485,768)
Accrued expenses and other current liabilities				(485,768)
Loss from operations		$ 734,914		485,768
Net cash used in operating activities				$ 0
Basic and diluted (in dollars per share)		$ 0.03		$ 0.02

v3.24.2.u1

Note 2 - Summary of Significant Accounting Policies and Basis of Presentation - Components of Cash and Cash Equivalents (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Cash on deposit	$ 1,251,654	$ 1,155,636
Money market funds (cash equivalents)	4,926,526	22,211,820
Cash and cash equivalents	$ 6,178,180	$ 23,367,456

v3.24.2.u1

Note 3 - Loss Per Share (Details Textual) - $ / shares	Jun. 30, 2024	Dec. 31, 2023
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 5.52	$ 6.03
Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.0001

v3.24.2.u1

Note 3 - Loss Per Share - Schedule of Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net loss	$ (7,859,919)	$ (11,707,948)	$ (15,293,527)	$ (18,559,637)
Basic and diluted (in shares)	30,555,012	22,434,781	30,221,168	22,135,850
Basic and diluted (in dollars per share)	$ (0.26)	$ (0.52)	$ (0.51)	$ (0.84)

v3.24.2.u1

Note 3 - Loss Per Share - Antidilutive Securities (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Antidilutive securities (in shares)	24,288,175	17,577,983	24,288,175	17,577,983
Share-Based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	1,505,572	1,547,774	1,505,572	1,547,774
Warrant [Member]
Antidilutive securities (in shares)	22,782,603	15,030,209	22,782,603	15,030,209
Earn-out Shares [Member]
Antidilutive securities (in shares)	0	1,000,000	0	1,000,000

v3.24.2.u1

Note 3 - Loss Per Share - Antidilutive Securities (Details) (Parentheticals) - $ / shares	Jun. 30, 2024	Dec. 31, 2023
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 5.52	$ 6.03
Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.0001

v3.24.2.u1

Note 4 - Warrants (Details Textual)		6 Months Ended
	May 28, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	May 27, 2024	Dec. 31, 2023 $ / shares	Nov. 30, 2023 $ / shares shares
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares		24,751,368
Proceeds from Issuance or Sale of Equity, Net		$ 2,805,221	$ 0
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares		$ 5.52			$ 6.03
The May 2024 Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares	1,898,734
Warrants and Rights Outstanding, Term (Year)	5 years
Warrants and Rights Outstanding	$ 1,100,000
The May 2024 Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	1.34
The May 2024 Warrants [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input	1.46
The May 2024 Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	5
The May 2024 Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.93
The May 2024 Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.046
The May 2024 Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0
Existing Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares						1,365,854
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 1.455					$ 5
Securities Purchase Required for Modification of Warrants	$ 3,000,000
Payment Required to Lower Exercise Price of Warrants	$ 200,000
Existing Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	1.34			1.34
Existing Warrants [Member] | Measurement Input, Exercise Price [Member]
Warrants and Rights Outstanding, Measurement Input	1.46			5
Existing Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	5			4.5
Existing Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.93			0.97
Existing Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.046			0.047
Existing Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0			0
The May 2024 Registered Direct Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares	1,898,734
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 1.58
Proceeds from Issuance or Sale of Equity, Net	$ 2,800,000
Payment of Equity Placement Costs, Agent Fees and Other Expenses	$ 400,000

v3.24.2.u1

Note 4 - Warrants - Warrants Outstanding (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Outstanding, number of warrants (in shares)	25,067,643
Outstanding, weighted average exercise price (in dollars per share)	$ 6.03
Outstanding, intrinsic value	$ 2,519,822	$ 29,686,123
Outstanding, weighted average remaining contractual term (Year)	2 years 9 months 18 days	3 years 1 month 6 days
Issued, number of warrants (in shares)	1,898,734
Issued, weighted average exercise price (in dollars per share)	$ 1.46
Outstanding, number of warrants (in shares)	26,966,377	25,067,643
Outstanding, weighted average exercise price (in dollars per share)	$ 5.52	$ 6.03

v3.24.2.u1

Note 4 - Warrants - Summary of Valuation Assumption (Details) - Existing Warrants [Member]	May 28, 2024	May 27, 2024
Measurement Input, Risk Free Interest Rate [Member]
Measurement Input	0.046	0.047
Measurement Input, Expected Term [Member]
Measurement Input	5	4.5
Measurement Input, Price Volatility [Member]
Measurement Input	0.93	0.97
Measurement Input, Share Price [Member]
Measurement Input	1.34	1.34
Measurement Input, Exercise Price [Member]
Measurement Input	1.46	5
Measurement Input, Expected Dividend Rate [Member]
Measurement Input	0	0

v3.24.2.u1

Note 5 - Stockholders' Equity (Deficit), Stock Option Plans, and Stock-based Compensation (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
	Jan. 01, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Common Stock, Shares Authorized		115,000,000		115,000,000		115,000,000
Common Stock, Par or Stated Value Per Share		$ 0.0001		$ 0.0001		$ 0.0001
Preferred Stock, Shares Authorized		10,000,000		10,000,000		10,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.0001		$ 0.0001		$ 0.0001
Common Stock, Shares, Outstanding		29,817,294		29,817,294		27,918,560
Preferred Stock, Shares Outstanding		0		0		0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)		1,505,572		1,505,572
Share-Based Payment Arrangement, Expense		$ 358,993	$ 2,620,819	$ 728,068	$ 2,672,346
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 2,400,000		$ 2,400,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition				2 years
Equity Incentive Plan 2020 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized						1,004,263
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized	2,791,856
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Percent of Increase	10.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant		3,871,121		3,871,121
Equity Incentive Plan 2006 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)		16,747		16,747

v3.24.2.u1

Note 5 - Stockholders' Equity (Deficit), Stock Option Plans, and Stock-based Compensation - Summary of Common Stock Reserved for Future Issuance (Details)	Jun. 30, 2024 shares
Shares underlying outstanding warrants (in shares)	24,751,368
Total common stock reserved for future issuance (in shares)	30,128,061
Stock options outstanding (in shares)	1,505,572
Equity Incentive Plan 2020 [Member]
Total common stock reserved for future issuance (in shares)	3,871,121

v3.24.2.u1

Note 5 - Stockholders' Equity, Stock Option Plans, and Stock-based Compensation - Stock Option Activity (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Stock options outstanding (in shares)	1,505,572
Share-Based Payment Arrangement, Option [Member]
Balance, shares available for grant (in shares)	1,004,263
Balance, number of options outstanding (in shares)	1,580,574
Balance, weighted average exercise price (in dollars per share)	$ 6.51
Balance, weighted average remaining contractual term (Year)	8 years 7 months 9 days	9 years 1 month 9 days
Balance, aggregate intrinsic value	$ 2,850	$ 300,969
Expired, shares available for grant (in shares)	75,002
Expired, number of options (in shares)	(75,002)
Expired, weighted average exercise price per share (in dollars per share)	$ 6.74
Authorized, shares available for grant (in shares)	2,791,856
Balance, shares available for grant (in shares)	3,871,121	1,004,263
Stock options outstanding (in shares)	1,505,572	1,580,574
Balance, weighted average exercise price (in dollars per share)	$ 6.49	$ 6.51
Options exercisable, number of options (in shares)	915,196
Options exercisable, weighted average exercise price per share (in dollars per share)	$ 6.8
Options exercisable, weighted average remaining contractual term (Year)	8 years 5 months 1 day
Options exercisable, aggregate intrinsic value	$ 2,492

v3.24.2.u1

Note 5 - Stockholders' Equity, Stock Option Plans, and Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock-based compensation expense	$ 358,993	$ 2,620,819	$ 728,068	$ 2,672,346
Research and Development Expense [Member]
Stock-based compensation expense	184,883	992,473	379,779	1,033,867
General and Administrative Expense [Member]
Stock-based compensation expense	$ 174,110	$ 1,628,346	$ 348,289	$ 1,638,479

v3.24.2.u1

Note 6 - Commitments and Contingencies (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Feb. 01, 2023
Operating Lease, Expense	$ 13,100	$ 5,200	$ 24,300	$ 10,200
Corporate Office Lease [Member]
Lessee, Operating Lease, Term of Contract	12 months		12 months
Lessee, Operating Lease, Monthly Lease Payment			$ 1,447
Lessee, Operating Lease, Renewal Term (Month)						12 months
Corporate Office Lease 2 [Member]
Lessee, Operating Lease, Term of Contract	12 months		12 months
Lessee, Operating Lease, Monthly Lease Payment			$ 4,300
Agreement With One of Clinical Research Organizations [Member]
Agreement, Required Upfront Float for Fees, Percentage	7.00%		7.00%
Agreement, Upfront Float, Percentage Left to Receive Invoice to Replenish	15.00%		15.00%
Agreement, Upfront Float, Percentage Used to Receive Invoice to Replenish	85.00%		85.00%
Upfront Float Balance	$ 0		$ 0		$ 0

v3.24.2.u1

Note 7 - Fair Value Measurements (Details Textual) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	24,751,368
Private Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	556,313
Warrants and Rights Outstanding, Fair Value	$ 150,205	$ 806,655

v3.24.2.u1

Note 7 - Fair Value Measurements - Fair Value on Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Total assets measured and recorded at fair value	$ 4,929,526	$ 22,211,820
Warrant liability	150,205	806,655
Total	150,205	806,655
Fair Value, Inputs, Level 1 [Member]
Total assets measured and recorded at fair value	4,929,526	22,211,820
Fair Value, Inputs, Level 2 [Member]
Total assets measured and recorded at fair value	0	0
Fair Value, Inputs, Level 3 [Member]
Total assets measured and recorded at fair value	0	0
Warrant liability	150,205	806,655
Total	150,205	806,655
Money Market Funds [Member]
Money market funds (cash equivalents)	4,929,526	22,211,820
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Money market funds (cash equivalents)	4,929,526	22,211,820
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Money market funds (cash equivalents)	0	0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Money market funds (cash equivalents)	$ 0	$ 0

v3.24.2.u1

Note 7 - Fair Value Measurements - Fair Value on Recurring Basis Unobservable Input Reconciliation (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Balance, beginning of period	$ 350,478	$ 556,313	$ 806,655	$ 567,439
Change in fair value of warrant liability	(200,273)	456,177	(656,450)	445,051
Balance, end of period	$ 150,205	$ 1,012,490	$ 150,205	$ 1,012,490

v3.24.2.u1

Note 7 - Fair Value Measurements - Key Inputs (Details) - Private Warrants [Member]		Jun. 30, 2024	Dec. 31, 2023
Measurement Input, Risk Free Interest Rate [Member]
Measurement Input		0.0492	0.0425
Measurement Input, Expected Term [Member]
Measurement Input		1.46	1.96
Measurement Input, Price Volatility [Member]
Measurement Input	[1]	1.445	0.89
Measurement Input, Share Price [Member]
Measurement Input		1.28	5.15
Measurement Input, Exercise Price [Member]
Measurement Input		11.5	11.5
[1] Based on volatility implied by guideline company publicly traded warrant market prices.

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