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Value, Recurring [Member] Income Taxes Income Tax Disclosure [Text Block] Cash, cash equivalents, and short-term investments Cash, Cash Equivalents, and Short-term Investments Common Stock Stockholders' Equity Note Disclosure [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Vested and exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Class of Stock [Line Items] Class of Stock [Line Items] Tax liability Accrued Income Taxes Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Unrealized loss on securities available-for-sale Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] 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 General and administrative General and Administrative Expense [Member] Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Total current liabilities Liabilities, Current Employee stock purchase plan Employee Stock [Member] Class of Stock [Domain] Class of Stock [Domain] Reverse recapitalization, cash paid to shareholders Reverse Recapitalization, Cash Paid To Shareholders Reverse Recapitalization, Cash Paid To Shareholders Schedule of Common Stock Reserved for Future Issuance Schedule Of Common Stock Reserved For Future Issuance [Table Text Block] Schedule Of Common Stock Reserved For Future Issuance Percentage of outstanding stock maximum Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum Mutual funds Mutual Fund [Member] Statement [Table] Statement [Table] Lease term with option to terminate Lessee, Operating Lease, Option to Terminate, Lease Term Lessee, Operating Lease, Option to Terminate, Lease Term Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Unrecognized compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Statistical Measurement [Axis] Statistical Measurement [Axis] Issuance of common stock upon exercise of warrants (in shares) Warrants exercised (in shares) Stock Issued During Period, Shares, Warrants Exercised Stock Issued During Period, Shares, Warrants Exercised Federal income tax at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Deposits Deposits Assets, Noncurrent Tax credits generated in current year Effective Income Tax Rate Reconciliation, Tax Credit, Amount Adjustments to reconcile net loss to net cash used in operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Fixed operating lease costs Operating Lease, Cost Computer hardware Computer Equipment [Member] Cash acquired through reverse recapitalization Cash Acquired Through Reverse Recapitalization Cash Acquired Through Reverse Recapitalization Schedule of Reverse Recapitalization Schedule Of Reverse Recapitalization [Table Text Block] Schedule Of Reverse Recapitalization