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Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of sublease contracts to other party Lessor, Operating Lease, Number Of Contracts Lessor, Operating Lease, Number Of Contracts Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Shares expected to be purchased under employee stock purchase plan Employee stock purchase plan Employee Stock [Member] Basic (in dollars per share) Basic net loss per share (in dollars per share) Earnings Per Share, Basic Original Distribution Agreement Original Distribution Agreement [Member] Original Distribution Agreement Total current assets Assets, Current Insider Trading Arrangements [Line Items] 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Awards Adjustments [Member] Akeso License and Collaboration Agreement Collaborative Arrangement Disclosure [Text Block] Total liabilities and stockholders' equity Liabilities and Equity Accelerated charges Share-Based Payment Arrangement, Accelerated Cost Options to purchase common stock Stock options Share-Based Payment Arrangement, Option [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] First and Third Amendment to Sublease Agreement Sublease Agreement, First and Third Amendment [Member] Sublease Agreement, First and Third Amendment Plan Name [Axis] Plan Name [Axis] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Other non-current liabilities Increase (Decrease) in Other Noncurrent Liabilities Other Other Nonoperating Income (Expense) Sale of intangible asset, contingent consideration, regulatory milestones, liability Sale of Intangible Asset, Contingent Consideration, Regulatory Milestones, Liability Sale of Intangible Asset, Contingent Consideration, Regulatory Milestones, Liability Name Awards Close in Time to MNPI Disclosures, Individual Name 2020 Stock Incentive Plan 2020 Stock Incentive Plan [Member] 2020 Stock Incentive Plan 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] Non-current assets: Assets, Noncurrent [Abstract] General and administrative General and Administrative Expense Sale of stock price (in dollars per share) Offering price (in dollars per share) Sale of Stock, Price Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, $0.01 par value, 20,000,000 shares authorized; none issued and outstanding at June 30, 2026 and December 31, 2025, respectively 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 Statement of Cash Flows [Abstract] Number of additional shares allowable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Allowable Under The Plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Allowable Under The Plan Remaining availability under the offering Sale Of Stock, Amount Remaining Under The Offering Sale Of Stock, Amount Remaining Under The Offering Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Stock options vested or expected to vest (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Name Measure Name Period for which the majority of contractual commitments are to be paid (in years) Other Commitment, Period for Which the Majority of Commitments are To Be Paid Other Commitment, Period for Which the Majority of Commitments are To Be Paid Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Payment for sale of patent Proceeds from Sale of Intangible Assets Short-term investments Short-Term Investments Lease, average annual lease payments Lessee, Operating Lease, Average Annual Lease Payments Lessee, Operating Lease, Average Annual Lease Payments Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Accrued research and development expenditure Accrued Research And Development, Current Accrued Research And Development, Current Company Selected Measure Amount Company Selected Measure Amount Payments to related party Related Party Transaction, Payments To Related Party Related Party Transaction, Payments To Related Party Genius Sublease Agreement and Investments Research Sublease Agreement Genius Sublease Agreement And Investments Research Sublease Agreement [Member] Genius Sublease Agreement And Vested and expected to vest at end of period, weighted average remaining contractual life Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Issuance of common stock under stock purchase plans and exercise of stock options and warrants (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 Collaborative arrangement, potential regulatory milestone payments Collaborative Arrangement, Rights And Obligations, Potential Regulatory Milestone Payments Collaborative Arrangement, Rights And Obligations, Potential Regulatory Milestone Payments Leased assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Maturities and sales of short-term investments Proceeds from Sale, Maturity and Collection of Short-Term Investments Foreign currency (loss) gain Gain (Loss), Foreign Currency Transaction, before Tax Award Timing Method Award Timing Method [Text Block] Increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Co-Chief Executive Officer Co-Chief Executive Officer [Member] Co-Chief Executive Officer Net loss Net loss Net loss Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] 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] Certificate of deposit Certificates of Deposit [Member] Stock options 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] Third Party Third Party [Member] Third Party Unrealized foreign exchange loss (gain) Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Third Amendment to Sublease Agreement Sublease Agreement, Third Amendment [Member] Sublease Agreement, Third Amendment Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]