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 months ended March 31, 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 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 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 months ended March 31, 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) 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 as of and for the quarterly period ended March 31, 2023, respectively. Previously reported net cash provided by financing activities for the three months ended March 31, 2023 were not impacted. 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 months ended March 31, 2023, as previously presented in Note 10 to the Company’s consolidated financial statements included in the 2023 Form 10-K. The restated line items of the consolidated statement operations for the three months ended March 31, 2023 are as follows: Originally Reported Adjustment Restated Three Months Ended March 31, 2023 Three Months Ended March 31, 2023 Three Months Ended March 31, 2023 Research and development $ 5,234,999 $ 249,146 $ 5,484,145 Total operating expenses 6,735,553 249,146 6,984,699 Loss from operations (6,735,553 ) (249,146 ) (6,984,699 ) Net loss (6,602,543 ) (249,146 ) (6,851,689 ) Basic and diluted $ (0.30 ) $ (0.01 ) $ (0.31 ) 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. The restated line items of the consolidated cash flow statement for the three months ended March 31, 2023 are as follows: Originally Reported Adjustment Restated Three Months Ended March 31, 2023 Three Months Ended March 31, 2023 Three Months Ended March 31, 2023 Cash flows from operating activities Net loss $ (6,602,543 ) $ (249,146 ) $ (6,851,689 ) Adjustments to reconcile net loss to net cash used in operating activities Changes in operating assets and liabilities Accrued expenses and other current liabilities 512,590 249,146 761,736 Net cash used in operating activities (7,951,397 ) — (7,951,397 ) Liquidity and going concern The Company has incurred losses since inception and as of March 31, 2024 the Company had a working capital deficit of approximately $1.0 million, an accumulated deficit of $141.8 million and cash and cash equivalents on hand of approximately $12.0 million. The Company’s net loss for the three months ended March 31, 2024 and 2023, was approximately $7.4 million and $6.9 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 is has adequate cash on hand to cover anticipated outlays well into the second quarter of fiscal year 2024, but will need additional fundraising activities and cash on hand during the second 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. 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 factors among others create a substantial doubt about the Company’s ability to continue as a going concern. 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 research and development activities, assumptions used to calculate the fair value of stock-based compensation, assumptions used to calculate the fair value of warrant liabilities, 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 form at three financial institutions. Deposits in financial institutions may, from time to time, exceed federally insured limits. 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. Fair Value Measurements ASC 820, Fair Value Measurements , 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 warrants, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as considers counterparty credit risk in its assessment of fair value. Due to their short maturities, the carrying amounts for cash and cash equivalents, accounts payable, and accrued expenses 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 $ 415.000 New accounting pronouncements not yet adopted In November 2023, the FASB issued 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. |