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Pre-funded warrants exercise price (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding STOCKHOLDERS' EQUITY Equity [Text Block] Personnel expenses (including share-based compensation) Personal Expenses [Member] Personal Expenses Security Exchange Name Security Exchange Name Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price JJDC Johnson & Johnson Innovation - JJDC, Inc. [Member] Johnson & Johnson Innovation - JJDC, Inc. 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U.S. government agency securities US Government Agencies Debt Securities [Member] Expected term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Share price (per share) Share Price RLYB116 RLYB116 [Member] RLYB116 PEO Name PEO Name Upfront payment Contract with Customer, Liability Proceeds from sale of common stock received from sale of joint venture Proceeds from Divestiture of Interest in Joint Venture Cash, cash equivalents and marketable securities Cash, Cash Equivalents, and Short-Term Investments Other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash and cash equivalents — beginning of period Cash and cash equivalents — end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Concurred financing Merger And Reorganization, Concurrent Financing Merger And Reorganization, Concurrent Financing Professional fees Accrued Professional Fees, Current Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Measurement Input, Premium Measurement Input, Premium [Member] Measurement Input, Premium Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] 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] Measurement Frequency [Domain] Measurement Frequency [Domain] Share-based compensation Share-Based Payment Arrangement, Noncash Expense Share-based compensation arrangement by share-based payment award, purchase price of common stock (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Investment, Name [Domain] Investment, Name [Domain] Net (loss) income per common share, basic (in dollars per share) Net (loss) income per common share, basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Deferred revenue Contract with Customer, Liability, Current Measurement Input, Risk Free Interest Rate Measurement Input, Risk Free Interest Rate [Member] Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] General and administrative, personnel expenses (including share-based compensation) General and Administrative Expense, Personnel Expenses General and Administrative Expense, Personnel Expenses Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated deficit Retained Earnings (Accumulated Deficit) Schedule of Marketable Securities by Balance Sheet Location Classification Available For Sale Securities By Balance Sheet Location Classification [Table Text Block] Available for sale securities by balance sheet location classification. Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Allocated amounts Equity Securities, FV-NI Stock Options and Nonvested Restricted Share Stock Options And Unvested Restricted Share [Member] Stock options and unvested restricted share. Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] COMMON Common Stock [Member] Future Milestone and Royalty Assets Future Milestone and Royalty Assets [Policy Text Block] Future Milestone and Royalty Assets Fair Value Debt securities, available-for-sale Debt Securities, Available-for-Sale Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Positions eliminated (as a percent) Restructuring and Related Cost, Number of Positions Eliminated, Period Percent Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Equity Awards Adjustments Equity Awards Adjustments [Member] COLLABORATION AND LICENSE AGREEMENTS Collaborative Arrangement Disclosure [Text Block] Total liabilities and stockholders' equity Liabilities and Equity Employee Stock Options Share-Based Payment Arrangement, Option [Member] Percent excess limit (as a percent) Exceed Limit Percentage With Exercise To Aggregate Shares Of Common Stock Beneficially Owned Exceed limit percentage with exercise to aggregate shares of common stock beneficially owned. Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other program candidates Other Program Candidates [Member] Other Program Candidates Asset Class [Axis] Asset Class [Axis] Plan Name [Axis] Plan Name [Axis] RE Ventures I, LLC RE Ventures I, LLC [Member] RE Ventures I, LLC. Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Schedule of Share-based Compensation Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name Concurrent Financing Concurrent Financing [Member] Concurrent Financing Stockholders' equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] 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] Outstanding stock options, aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period General and administrative General and Administrative Expense Sale of common stock, price per share (in dollars per share) Sale of Stock, Price Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, $0.0001 par value per share; 50,000,000 shares authorized as of September 30, 2026 and December 31, 2025; no shares issued or outstanding as of September 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Net unrealized gain (loss) on marketable securities Marketable Security, Unrealized Gain (Loss) Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] RESTRUCTURING AND SEVERANCE Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Fair value Assets, Fair Value Disclosure Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] 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] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] ADDITIONAL PAID-IN CAPITAL Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Aggregate fair value of available-for-sale debt securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position Unaudited Financial Information Unaudited Financial Information [Policy Text Block] Unaudited Financial Instrument Name Trading Arrangement, Individual Name Unrecognized share-based compensation expense, restricted stock units Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Measurement input Equity Securities, FV-NI, Measurement Input 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 Income tax expense Income Tax Expense (Benefit) Additional financial support outside of capital contribution Additional Financial Support Outside Of Capital Contribution Additional Financial Support Outside Of Capital Contribution Award Timing Method Award Timing Method [Text Block] Net increase in cash and cash equivalents 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] Expected volatility, minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Net (loss) income Net (loss) income Net income (loss) Net (loss) income 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] Proceeds from the issuance of common stock from exercise of stock options Proceeds from Stock Options Exercised Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Exercisable stock options at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Milestone payment received Proceeds From Sale Of Equity Method Investments, Milestone Payment Received Proceeds From Sale Of Equity Method Investments, Milestone Payment Received Revenue: Revenues [Abstract] Measurement Input, Discount for Lack of Marketability Measurement Input, Discount for Lack of Marketability [Member] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND PRINCIPLES OF CONSOLIDATION Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]