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Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract] Share Options, Aggregate Intrinsic Value Amendment Flag Amendment Flag Tax Credit Carryforward, Amount Research and experimentation credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Research and experimentation credits Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Deferred Tax Liabilities, Gross [Abstract] Deferred tax liabilities: Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Accrued compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Total Operating loss carryforwards expiration year. Operating Loss Carryforwards Expiration Year Operating loss carryforwards expiration year Tax Period [Domain] Tax Period Entity File Number Entity File Number Deferred tax assets liabilities, net, increase (decrease). Deferred Tax Assets Liabilities Net Increase Decrease Decrease in deferred tax assets and liabilities Deferred Tax Assets, Gross Total deferred tax assets Rule 10b5 1 Arr Modified [Flag] Rule 10b5 1 Arr Modified [Flag] Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash and cash equivalents, end of year Cash and cash equivalents, beginning of year Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Total University medical center of Johannes Gutenberg university Mainz. University Medical Center Of Johannes Gutenberg University Mainz [Member] University Medical Center of Johannes Gutenberg University Mainz Share-Based Payment Arrangement [Abstract] Accounts Payable, Current Accounts payable Accounts Payable, Current, Total Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted Average Grant Date Date Fair Value, RSUs outstanding, beginning of period Weighted Average Grant Date Date Fair Value, RSUs outstanding, end of period Deferred Tax Assets, Valuation Allowance Valuation allowance Operating Expenses Total costs and expenses Auditor Location Auditor Location Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Expected term Entity Address, Address Line Two Entity Address, Address Line Two Deferred Tax Assets, Goodwill and Intangible Assets Capitalized intangibles Preferred stock, $0.001 par value; 5 million shares authorized; no shares issued or outstanding at December 31, 2023 and 2022 Preferred Stock, Value, Issued Entity Small Business Entity Small Business Entity Shell Company Entity Shell Company Number of Operating Segments Number of segments Debt, Long-Term and Short-Term, Combined Amount Debt outstanding Debt, Long-Term and Short-Term, Combined Amount, Total Class of Warrant or Right, Exercise Price of Warrants or Rights Purchase price per warrant Weighted Average Exercise Price Class of Warrant or Right [Domain] Class of Warrant or Right Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Unrecognized compensation expense related to unvested stock awards Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] RSUs, Weighted Average Grant Date Fair Value Computer Equipment [Member] Computer Equipment Earnings Per Share [Text Block] Net Loss Per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Number of Options, Forfeited and cancelled Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Total Entity Address, Address Line One Entity Address, Address Line One Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents consisting of money market funds and commercial paper Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Antidilutive Securities [Axis] Antidilutive Securities Income Statement Location [Axis] Income Statement Location Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Options granted Title of 12(b) Security Title of 12(b) Security Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount State income tax benefit, net of federal benefit Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Segment Reporting, Policy [Policy Text Block] Segments Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset Deferred tax assets and liabilities valuation allowance. Deferred Tax Assets And Liabilities Valuation Allowance Valuation allowance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Term (in years), Options exercisable Common Stock, Shares, Outstanding Ending Balance, shares Beginning Balance, shares Common stock, shares outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-Based Payment Arrangement [Text Block] Share-based Compensation Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted Average Grant Date Date Fair Value, RSUs outstanding, Forfeited and cancelled Tax Credit Carryforward [Axis] Tax Credit Carryforward Income Statement Location [Domain] Income Statement Location Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted Average Exercise Price, Granted Document Type Document Type Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Counterparty Name [Domain] Counterparty Name Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of Shares, RSUs outstanding, Forfeited and cancelled Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Entity Filer Category Entity Filer Category Deferred Tax Assets, Tax Credit Carryforwards, Research Research and experimentation credits Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of noncash investing and financing transactions: Balance Sheet Location [Domain] Increase (Decrease) in Other Noncurrent Assets Other assets Comprehensive loss policy. Comprehensive Loss Policy Policy [Text Block] Comprehensive Loss Warrant expiration two thousand and twenty two. Warrant Expiration Two Thousand And Twenty Two [Member] 2022 Asset Class [Axis] Asset Class Liabilities Total liabilities Property, Plant and Equipment [Table] Schedule Of Property Plant And Equipment [Table] Equity, Attributable to Parent Ending Balance Beginning Balance Total stockholders’ equity Defined Contribution Plan, Description Matching contribution Documents Incorporated by Reference [Text Block] Documents Incorporated by Reference Percentage of retention bonuses Percentage of Retention Bonuses Percentage of retention bonuses. Income tax. Income Tax [Line Items] Income Tax [Line Items] Net loss Statement of Financial Position [Abstract] Area of Real Estate Property Area of office facilities taken on lease Weighted Average Number of Shares Outstanding, Diluted, Total Weighted Average Number of Shares Outstanding, Diluted Diluted Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Income Tax Benefit Attributable to Our Loss from Operations Operating Lease, Right-of-Use Asset, Periodic Reduction Amortization of right-of-use asset - operating Lessee operating sublease term of contract. Lessee Operating Sublease Term Of Contract Operating sublease term First three percent pay contribution. First Three Percent Pay Contribution [Member] First 3% of pay contributed Two thousand and thirteen plan. Two Thousand And Thirteen Plan [Member] 2013 Plan Operating Lease, Weighted Average Remaining Lease Term Weighted-average remaining lease term Restructuring Reserve, Current Restructuring charges Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Percentage of exercise price of stock option Use of Estimates, Policy [Policy Text Block] Accounting Estimates in the Preparation of Financial Statements Income Tax Disclosure [Text Block] Income Taxes Interest and Other Income Interest and other income Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted Average Exercise Price, Options outstanding, end of period Weighted Average Exercise Price, Options outstanding, beginning of period Weighted Average exercise Price of Options Outstanding Adjustment of the carrying value of deferred tax assets during the year. Income Tax Reconciliation Adjustment To Deferred Tax Asset Deferred tax asset adjustment Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Fair Value Disclosures [Abstract] Amount of deferred tax liability attributable to taxable temporary differences from right of use assets. Deferred Tax Liabilities Right Of Use Asset Right-of-use asset Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV Measurement Frequency [Domain] Measurement Frequency Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Type of Restructuring [Domain] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Number of Shares, RSUs outstanding, Vested and released Stock Issued During Period, Shares, New Issues Issuance of common stock for cash, net of offering costs, shares Sale of common stock Employee-related Liabilities, Current Accrued compensation and employee benefits Employee-related Liabilities, Current, Total Class of Warrant or Right [Axis] Class of Warrant or Right Income Tax Disclosure [Abstract] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name Operating Loss Carryforwards Net operating loss carryforwards