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[Abstract] Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Non-US Non-US [Member] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and stockholders’ equity (deficit) Liabilities and Equity Share-Based Payment Arrangement, Option Stock options Share-Based Payment Arrangement, Option [Member] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Weighted Average Remaining Contractual Term (Years) Class Of Warrant Or Right, Term Of Warrant Class Of Warrant Or Right, Term Of Warrant Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Change in estimate for legal contingency Gain (Loss) from Estimated Legal Contingency Gain (Loss) from Estimated Legal Contingency Tabular List, Table Tabular List [Table Text Block] Other expense Other Nonoperating Income (Expense) Insurance premium loan payable Loans Payable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Schedule of other current liabilities Other Current Liabilities [Table Text Block] General and administrative General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock, $0.001 par value; 200,000 shares authorized at June 30, 2026 and December 31, 2025; no shares issued and outstanding at June 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Payments for repurchase of warrants Payments for Repurchase of Warrants Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Name Measure Name Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Other current assets Increase (Decrease) in Other Current Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] January 2024 PIPE Financing Pre-Funded Warrants January 2024 PIPE Financing Pre-Funded Warrants [Member] January 2024 PIPE Financing Pre-Funded Warrants Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Short-term investments Short-Term Investments Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Research and development costs Accrued Research And Development Costs, Current Accrued Research And Development Costs, Current Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Entity Address, Address Line Two Entity Address, Address Line Two Stock-based compensation expense (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Current assets Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Provision for income taxes Income Tax Expense (Benefit) Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Other research and development expenses Other Research and Development Expense Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Research and development Research and Development Expense (Excluding Acquired in Process Cost) Estimate for accrued legal contingencies and related expenses Loss Contingency, Accrual, Current Net loss Net Loss Net loss Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Interest and other income, net Investment Income, Interest Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]