Cover [Abstract] Document Information [Table] Document Information [Line Items] Document Type Entity Registrant Name Entity Central Index Key Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Document Quarterly Report Document Transition Report Amendment Flag Entity File Number Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Entity Common Stock, Shares Outstanding Current Fiscal Year End Date Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Liabilities and Equity [Abstract] LIABILITIES, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) Liabilities, Current [Abstract] Current liabilities Preferred Stock Warrant Liability Current Preferred stock warrant liability Preferred Stock Warrant Liability Current. Preferred Stock Tranche Rights Liability Current Preferred stock tranche rights liability Preferred stock tranche rights liability current. Accounts Payable and Other Accrued Liabilities, Current Accrued expenses and other current liabilities Total accrued expenses and other current liabilities Accounts Payable, Current Accounts payable Liabilities Total liabilities Temporary Equity, Carrying Amount, Attributable to Parent Convertible Preferred Stock, Issued Carrying Value Stockholders' Equity Attributable to Parent [Abstract] Stockholders' deficit Retained Earnings (Accumulated Deficit) Accumulated deficit Common Stock, Value, Issued Common stock, $0.0001 par value; 300,000,000 shares authorized and 40,470,323 shares issued and outstanding as of September 30, 2021; 50,500,000 shares authorized and 419,124 shares issued and outstanding as of December 31, 2020 Additional Paid in Capital Additional paid-in capital Stockholders' Equity Attributable to Parent Total stockholders' equity (deficit) Closing balance Opening balance Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Preferred Stock, Value, Issued Preferred stock, $0.0001 par value; 10,000,000 shares authorized and no shares issued and outstanding as of September 30, 2021; no shares authorized, issued and outstanding as of December 31, 2020 Liabilities and Equity Total liabilities, convertible preferred stock and stockholders' equity (deficit) Assets [Abstract] ASSETS Other Assets, Noncurrent Other assets Assets Total assets Assets, Current [Abstract] Current assets Assets, Current Total current assets Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Total prepaid expenses and other current assets Grants Receivable, Current Grant receivable Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents at the beginning of the period Cash and cash equivalents at the end of the period Marketable Securities, Current Marketable securities, short-term Property, Plant and Equipment, Net Property and equipment, net Marketable Securities, Noncurrent Marketable securities, long-term Class of Stock [Axis] Class of Stock [Domain] Series A1 Convertible Preferred Stock [Member] Series A-1 Convertible Preferred Stock [Member] Series A-1 convertible preferred stock [Member]. Series A Convertible Preferred Stock [Member] Series A Convertible Preferred Stock [Member] Series A Series A convertible preferred stock [Member]. Series B Convertible Preferred Stock [Member] Series B Convertible Preferred Stock [Member] Series B Series B convertible preferred stock [Member]. Common Stock, Shares, Issued Common Shares Issued Common Stock, Shares, Outstanding Common Shares Outstanding Common Stock, Shares Authorized Common Shares Authorized Common stock shares authorized Temporary Equity, Shares Issued Convertible Preferred Stock Shares Issued Shares Issued Temporary Equity, Shares Outstanding Convertible Preferred Stock Shares Outstanding Temporary Equity, Shares Outstanding Shares Outstanding Preferred Stock, Par or Stated Value Per Share Preferred stock, par or stated value per share Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding Temporary Equity, Par or Stated Value Per Share Convertible Preferred Stock Par Value Temporary equity par or stated value per share Temporary Equity, Liquidation Preference Convertible Preferred Stock, Liquidation Preference Liquidation Preference Common Stock, Par or Stated Value Per Share Common Stock Par Value Common stock par or stated value per share Temporary Equity, Shares Authorized Convertible Preferred Stock Shares Authorized Shares Authorized Temporary equity shares authorized Income Statement [Abstract] Grant And Other Revenue Grant and other revenue Grant and other revenue. Nonoperating Income (Expense) [Abstract] Other income (expense) Other Nonoperating Income (Expense) Other income Investment Income, Interest Interest income Nonoperating Income (Expense) Total other income (expense) Interest Expense Interest expense Fair Value Adjustment Of Preferred Stock Tranche Rights Liability And Preferred Stock Warrant Liability Change in fair value of preferred stock tranche rights liability and preferred stock warrant liability Change in fair value of preferred stock tranche rights liability and preferred stock warrant liability Fair value adjustment of preferred stock tranche rights liability and preferred stock warrant liability. Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted-average shares outstanding, basic and diluted Statement of Other Comprehensive Income [Abstract] Other comprehensive loss OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Unrealized loss on marketable securities Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss Operating Expenses [Abstract] Operating expenses Research and Development Expense Research and development General and Administrative Expense General and administrative Operating Expenses Total operating expenses Net Income (Loss) Attributable to Parent Net loss Net loss Earnings Per Share, Basic and Diluted Net loss per common share, basic and diluted Operating Income (Loss) Loss from operations Statement of Stockholders' Equity [Abstract] APIC, Share-based Payment Arrangement, Increase for Cost Recognition Share-based compensation Reclassification Of Preferred Stock Tranche Rights Liability Upon Issuance of Milestone Shares Reclassification of preferred stock tranche rights liability upon issuance of milestone shares Reclassification of preferred stock tranche rights liability upon issuance of milestone shares. Shares, Outstanding Opening balance (Shares) Closing balance (Shares) Reclassification Of Warrant Liability Upon Exercise Of Preferred Stock Warrant Reclassification of warrant liability upon exercise of preferred stock warrant Reclassification of warrant liability upon exercise of preferred stock warrant. Stock Issued During Period Value Common Stock Warrants Exercised Exercise of common stock warrants Stock issued during period, value, common stock warrants exercised. Stock Issued During Period, Shares, Preferred Stock Warrants Exercised Exercise of preferred stock warrant (shares) Stock issued during period, shares, preferred stock warrants exercised. Stock Issued During Period Shares Common Stock Warrants Exercised Exercise of common stock warrants (Shares) Stock issued during period, shares, common stock warrants exercised. Stock Issued During Period Shares Cashless Common Stock Warrants Exercised Cashless exercise of common stock warrants Stock issued during period shares cashless common stock warrants exercised. Stock Issued During Period, Value, Stock Options Exercised Stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock options exercised, Shares Stock options exercised, Stock Options Temporary Equity Shares Issued During The Period Shares Issuance of milestone shares for cash, net of issuance costs (Shares) Temporary equity shares issued during the period shares Temporary equity shares issued during the period shares. Temporary Equity, Stock Issued During Period, Value, New Issues Issuance of milestone shares for cash, net of issuance costs Stock Issued During Period Value Preferred Stock Warrants Exercised Exercise of preferred stock warrant Stock issued during period, value, preferred stock warrants exercised. Reclassifications of Temporary to Permanent Equity Conversion of convertible preferred stock into common stock upon initial public offering Reclassifications Of Temporary To Permanent Equity Shares Conversion of convertible preferred stock into common stock upon initial public offering, Shares Reclassifications of temporary to permanent equity shares. Stock Issued During Period, Value, New Issues Issuance of common stock for cash, net of issuance costs of $15,441 Stock Issued During Period, Shares, New Issues Issuance of common stock for cash, net of issuance costs of $15,441, Shares Stock issued during the period, shares Equity Components [Axis] Equity Component [Domain] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Common Stock [Member] Common Stock [Member] AOCI Attributable to Parent [Member] Accumulated Deficit [Member] Accumulated Other Comprehensive Income Loss One [Member] Accumulated Other Comprehensive Loss Stock Issuance Costs Stock issuance Costs Stock Issuance Costs. Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Share-based Payment Arrangement, Noncash Expense Share-based compensation expense Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase decrease in grants receivable Grant receivable Increase (decrease) in grants receivable. Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued expenses and other current liabilities Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Depreciation Accretion (Amortization) of Discounts and Premiums, Investments Amortization of premiums on marketable securities, net Interest Income, Debt Securities, Available-for-sale, Operating Non-cash interest income from marketable securities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities Proceeds from Stock Options Exercised Proceeds from stock option exercises Proceeds from Issuance of Convertible Preferred Stock Proceeds from issuance of Series B milestone shares, net of issuance costs Proceeds from convertible preferred stock Proceeds from Warrant Exercises Proceeds from exercise of warrants Proceeds from Issuance of Common Stock Proceeds from issuance of common stock upon initial public offering, net of issuance costs Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Noncash Investing and Financing Items [Abstract] Supplemental disclosure of noncash financing activities Reclassification Of Preferred Stock Tranche Rights Liability Upon Share Issuance Reclassification of preferred stock tranche rights liability upon share issuance Reclassification of preferred stock tranche rights liability upon share issuance. Conversion Of Convertible Preferred Stock Into Common Stock Upon IPO Conversion of convertible preferred stock into common stock upon initial public offering Conversion of convertible preferred stock into common stock upon ipo. Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Payments to Acquire Productive Assets Purchases of property and equipment Payments to Acquire Marketable Securities Purchases of available-for-sale marketable securities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Net change in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information Income Taxes Paid, Net Cash paid for income taxes Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest Class Of Warrant Or Right Exercise Price Of Warrants Or Rights [Axis] Class of warrant or right exercise price of warrants or rights. Class Of Warrant Or Right Exercise Price Of Warrants Or Rights [Domain] Class of warrant or right exercise price of warrants or rights. Common Stock Warrants [Member] Common Stock Warrants [Member] Common stock warrants. Series A One Convertible Preferred Stock Warrant Liability [Member] Series A -1 Convertible Preferred Stock Warrant Liability [Member] Series A One Convertible Preferred Stock Warrant Liability. Organization, Consolidation and Presentation of Financial Statements [Abstract] Nature of Operations [Text Block] Description of Organization and Business Operations Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Basis of Presentation, Summary of Significant Accounting Policies and Recent Accounting Pronouncements Marketable Securities [Abstract] Disclosure Of Marketable Securities [Text Block] Marketable Securities Disclosure of marketable securities. Supplemental Financial Information [Abstract] Supplemental financial information [Abstract]. Supplemental Financial Information [Text Block] Supplemental Financial Information Supplemental financial information [Text block]. Convertible Preferred Stock Tranche Liability and Warrant Liability [Abstract] Convertible Preferred Stock Tranche Liability And Warrant Liability [Text Block] Convertible Preferred Stock, Tranche Liability and Warrant Liability Convertible Preferred Stock Tranche Liability and Warrant Liability [Text Block]. Stockholders' Equity Note [Abstract] Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity (Deficit) Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Text Block] Share-Based Compensation Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Earnings Per Share [Abstract] Earnings Per Share [Text Block] Net Loss Per Share Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Preferred Stock Warrant Liability [Policy Text Block] Preferred Stock Warrant Liability Preferred Stock Warrant Liability. Common Stock Warrants [Policy Text Block] Common Stock Warrants Common Stock Warrants. Convertible Preferred Stock [Policy Text Block] Convertible Preferred Stock Convertible Preferred Stock. Preferred Stock Tranche Rights Liability [Policy Text Block] Preferred Stock Tranche Rights Liability Preferred Stock Tranche Rights Liability. Grant and Other Revenue Recognition [Policy Text Block] Grant and Other Revenue Recognition Grant and Other Revenue Recognition. Research and Development Expense, Policy [Policy Text Block] Research and Development Expense Compensation Related Costs, Policy [Policy Text Block] Share-based Compensation Income Tax, Policy [Policy Text Block] Income Taxes Earnings Per Share, Policy [Policy Text Block] Net Loss Per Share of Common Stock New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncements Segment Reporting, Policy [Policy Text Block] Segment Information Use of Estimates, Policy [Policy Text Block] Use of Estimates Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentrations of Credit Risk Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Grant Receivable [Policy Text Block] Grant Receivable Grant Receivable. Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Emerging Growth Company [Policy Text Block] Emerging Growth Company Emerging Growth Company. Property and Equipment Marketable Securities Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Summary of Fair Value Measurements, Recurring and Nonrecurring Marketable Securities [Table Text Block] Summary of Marketable securities Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Schedule of Prepaid Expenses and Other Current Assets Disclosure Of Accrued Expenses And Other Current Liabilities [Table Text Block] Schedule of Accrued Expenses and Other Current Liabilities Disclosure of accrued expenses and other current liabilities [Table text block]. Disclosure Details Of Assumptions Used In Estimating The Fair Value Of Warrant Liability [Table Text Block] Summary of Fair Value of the Warrant Liability Disclosure Details Of Assumptions Used In Estimating The Fair Value Of Warrant Liability [Table Text Block]. Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Summary of the Tranche Liability and Warrant Liability Measured at Fair Value using Level 3 Significant Unobservable Inputs Temporary Equity [Table Text Block] Summary of Convertible preferred stock Disclosure Details Of Assumptions Used In Estimating The Fair Value Of Preferred Stock Tranche Liability [Table Text Block] Summary of Assumptions Used in Estimating the Fair Value of Preferred Stock Tranche Liability Disclosure Details Of Assumptions Used In Estimating The Fair Value Of Preferred Stock Tranche Liability [Table Text Block]. Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Summary of Outstanding Warrants to Purchase the Company's Common Stock Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Summary of Share-Based Compensation Expense Related to Stock Options Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Assumptions Used for Valuation of Fair Value of Stock Options Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Summary of Stock Option Activity Sharebased Compensation Arrangement by Sharebased Payment Award, Share of Common Stock Fair Value Assumptions [Table Text Block] Summary of Assumptions Used for Valuation of Fair Value of Stock Sharebased Compensation Arrangement by Sharebased Payment Award, Share of Common Stock Fair Value Assumptions [Table Text Block] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Summary of Future Minimum Lease Payments Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of Dilutive Securities Not Included in the Diluted Net Loss Per Common Share Collaborative Arrangement and Arrangement Other than Collaborative [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Sale of Stock [Axis] Sale of Stock [Domain] IPO [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Sale of Stock, Number of Shares Issued in Transaction Sale of stock, number of shares issued in transaction underwriting shares Underwriting shares Underwriting Shares. Sale of Stock, Price Per Share Sale of stock, price per share Stockholders' Equity, Reverse Stock Split Stockholders' equity, reverse stock split Sale of Stock, Consideration Received on Transaction Sale of stock, consideration received on transaction Percentage of Stockholders Elected to Waive Achievement of Milestone Percentage of stockholders elected to waive achievement of milestone Percentage of stockholders elected to waive achievement of milestone. Underwriting Discounts And Commissions And Other Offering Expenses underwriting discounts and commissions and other offering expenses underwriting discounts and commissions and other offering expenses. working capital Working capital Working capital. Stock Issued During Period, Shares, Period Increase (Decrease) Total number of outstanding shares increased Conversion of Stock, Shares Converted Conversion of stock, shares converted Class of Warrant or Right, Number of Securities Called by Warrants or Rights Number of securities called by warrants or rights Class of warrants or rights number of shares covered by warrants or rights Previously Reported [Member] Series A Convertible Preferred Stock [Member] Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Net of Tax, Portion Attributable to Parent, Available-for-sale Securities Other than temporary impairment losses, investments portion in other comprehensive loss net of tax available-for sale securities Property, Plant and Equipment, Estimated Useful Lives Property, Plant and Equipment, Estimated Useful Lives Class of Warrant or Right, Outstanding Total Warrants Class of Warrant or Right, Exercise Price of Warrants or Rights Class of Warrant or Right, Exercise Price of Warrants or Rights Class of warrants or right exercise price per share Exercise Price Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Uncertain tax positions, interest or penalties recorded Cash Equivalents, at Carrying Value Cash equivalents Unrecognized Tax Benefits Uncertain tax positions Investment Type [Axis] Investments [Domain] Marketable Debt Securities [Member] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Domain] Computer Equipment [Member] Event [Axis] Event. Event [Domain] Event. Warrant Exercise [Member] Warrant Exercise [Member] Warrant exercise. Assets, Fair Value Disclosure [Abstract] Assets included in: Assets, Fair Value Disclosure Fair value Liabilities, Fair Value Disclosure [Abstract] Liabilities included in: Financial and Nonfinancial Liabilities, Fair Value Disclosure Fair value Asset Class [Axis] Asset Class [Domain] Cash and Cash Equivalents [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 2 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 3 [Member] Significant Unobservable Inputs (Level 3) [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Preferred stock tranche rights liability [Member] Preferred stock tranche rights liability [Member] Preferred stock tranche rights liability. Preferred stock warrant liability [Member] Preferred stock warrant liability [Member] Preferred stock warrant liability. Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Money Market Funds [Member] Money Market Funds [Member] Financial Instrument [Axis] Financial Instruments [Domain] Commercial Paper [Member] Corporate Debt Securities [Member] Asset-backed Securities [Member] US Treasury Securities [Member] Marketable Securities [Table] Marketable Securities [Line Items] Available For Sale Securities Classified As Short Term Maturity Available-for-sale securities classified as short-term maturity Available-for-sale securities classified as short-term maturity. Available For Sale Securities Classified As Long Term Maturity Available-for-sale securities classified as long-term maturity Available-for-sale securities classified as long-term maturity. Marketable Debt Securities Short Term [Member] Marketable Debt Securities Long Term [Member] Debt Securities, Available-for-sale, Amortized Cost, Current Amortized cost, Short term Debt Securities, Available-for-sale, Unrealized Loss Gross Unrealized Loss Debt Securities, Available-for-sale, Current Fair value, Short Term Debt Securities, Available-for-sale, Amortized Cost, Noncurrent Amortized cost, Long term Debt Securities, Available-for-sale, Noncurrent Fair value, Long Term Debt Securities, Available-for-sale, Amortized Cost Amortized Cost, Total Debt Securities, Available-for-sale Fair value, Total Prepaid Expense and Other Assets, Current [Abstract] Disclosure Of Prepaid Expenses And Other Current Assets [Table] Disclosure of prepaid expenses and other current assets [Table]. Disclosure Of Prepaid Expenses And Other Current Assets [Line Items] Disclosure of prepaid expenses and other current assets [Line items]. Other Prepaid Expenses And Other Current Assets Other Other prepaid expenses and other current assets. Research And Development Service Agreements Research and development service agreements Research and development service agreements. Prepaid Insurance Prepaid Insurance Prepaid Raw Materials Prepaid raw materials Prepaid raw materials. Disclosure of Accrued Expenses and Other Current Liabilities [Abstract] Disclosure of accrued expenses and other current liabilities [Abstract]. Disclosure of Accrued Expenses and Other Current Liabilities [Table] Disclosure of accrued expenses and other current liabilities [Table]. Disclosure of Accrued Expenses and Other Current Liabilities [Line Items] Disclosure of accrued expenses and other current liabilities [Line item]. Research And Development Liability Research and development Research and development liability. Accrued Professional Fees, Current Professional fees Other Accrued Liabilities, Current Other Employee-related Liabilities, Current Bonuses and other employee liabilities Convertible Preferred Stock Tranche Liability And Warrant Liability [Table] Convertible Preferred Stock Tranche Liability And Warrant Liability [Line Items] Percentage Of Votes In Terms Of Shareholding Needed For Conversion Into Permanent Equity Percentage of votes in terms of shareholding needed for conversion into permanent equity Percentage of votes in terms of shareholding needed for conversion into permanent equity. Temporary Equity Issue Price Per Share Temporary equity issue price per share Temporary equity issue price per share. Shares Issued, Price Per Share Sale of stock issue price per share Fair Value Of Warrant Liability Per Share Fair value of warrant liability per share Fair value of warrant liability per share. Proceeds from Issuance Initial Public Offering Proceeds from initial public offer Number Of Times The Redeemable Convertible Preferred Stock Equal To The Share Issue Price Number of times the redeemable convertible preferred stock equal to the share issue price Number of times the redeemable convertible preferred stock equal to the share issue price. Financial Liabilities Fair Value Disclosure Financial liabilities at fair value Warrants and Rights Outstanding, Maturity Date Class of warrants or rights expiry date Expiration Dates Warrants and Rights Outstanding, Term Class of warrants or rights term Temporary Equity Milestone Shares Temporary equity milestone shares Temporary equity milestone shares. Scenario [Axis] Scenario [Domain] Private Placement [Member] Statistical Measurement [Axis] Statistical Measurement [Domain] Minimum [Member] Minimum [Member] Basis of Determining Fair Value [Axis] Basis of Determining Fair Value [Domain] Based On The Underlying Equity Value [Member] Underlying Equity Value [Member] Based on the Underlying Equity Value. Series B Convertible Preferred Stock Tranche Rights Liability [Member] Series B Convertible Preferred Stock Tranche Rights Liability. Series A One Convertible Preferred Stock [Member] Series A-1 Redeemable Convertible Preferred Stock [Member] Series A-1 Series A One Convertible Preferred Stock [Member] Series B Redeemable Convertible Preferred Stock [Member] Series B Redeemable Convertible Preferred Stock [Member] Series B redeemable convertible preferred stock. Convertible Preferred Stock [Member] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Condition of Issue [Axis] Condition of Issue [Domain] Closing Of Milestone [Member] Closing of Milestone [Member] Closing of Milestone. Initial Closing [Member] Initial Closing. Achievement Of Milestone [Member] Achievement of Milestone [Member] Achievement of Milestone. Prospective Conversion Of Temporary Equity Into Permanent Equity [Member] Prospective Conversion of Temporary Equity into Permanent Equity [Member] Prospective Conversion of Temporary Equity into Permanent Equity. Temporary Equity [Line Items] Temporary Equity Weighted Average Issue Price Per Share Weighted Average Issuance Price per Share Temporary equity weighted average issue price per share. Fair Value Of Convertible Preferred Stock Tranche Liability Expected Time To Milestone Closing Expected time to Milestone Closing (in years) Fair value of convertible preferred stock tranche liability expected time to milestone closing. Fair Value Of Convertible Preferred Stock Tranche Liability Probability Of Milestone Acheivement Probability of achievement of Milestone Closing Fair value of convertible preferred stock tranche liability probability of milestone achievement. Fair Value Of Convertible Preferred Stock Tranche Liability Assumption Of Risk Free Interest Rate Risk-free interest rate Fair value of convertible preferred stock tranche liability assumption of risk free interest rate. Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Warrants and Rights Outstanding, Measurement Input Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input, Expected Term [Member] Expected term (in years) Measurement Input, Price Volatility [Member] Expected volatility Measurement Input, Risk Free Interest Rate [Member] Risk-free interest rate Measurement Input, Expected Dividend Rate [Member] Expected dividend yield Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Settlement of tranche liability due to issuance of Milestone Shares Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Settlement of warrant liability upon exercise of warrant Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Balance, December 31, 2020 Balance, September 30, 2021 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Change in fair value Series A One Preferred Stock Warrant Liability [Member] Series A-1 Preferred Stock Warrant Series A One Preferred Stock Warrant Liability. Series B Tranche Rights [Member] Series B Tranche Rights Series B Tranche Rights. Schedule of Stock by Class [Table] Series A Redeemable Convertible Preferred Stock [Member] Series A Redeemable Convertible Preferred Stock [Member] Series A redeemable convertible preferred stock. Class of Stock [Line Items] Common Stock, Voting Rights Common stock shares voting rights Total Shares Authorized Total shares authorized Total shares authorized. Class of Warrant or Right [Table] Year Of Issuance Of Common Stock Warrants [Axis] Year of issuance of common stock warrants. Year Of Issuance Of Common Stock Warrants [Domain] Year of issuance of common stock warrants. Year Two Thousand And Fourteen [Member] Warrants issued in 2014 [Member] Year 2014. Year Two Thousand And Sixteen [Member] Warrants issued in 2016 [Member] Year 2016. Year Two Thousand And Seventeen [Member] Warrants issued in 2017 [Member] Year 2017. Year Two Thousand And Fifteen [Member] Warrants issued in 2015 [Member] Year 2015. Maximum [Member] Maximum [Member] Class of Warrant or Right [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Details [Axis] Details. Details [Domain] Details. Stock Options Granted Before December Thirty First Two Thousand And Seventeen [Member] Stock Options Granted Before December 31, 2017 [Member] Stock options granted before December 31, 2017. Stock Options Granted After December Thirty First Two Thousand And Seventeen [Member] Stock Options Granted After December 31, 2017 [Member] Stock options granted after December 31, 2017. Fair Value Of A Share Of Common Stock Fair value of a share of common stock Fair value of a share of common stock. Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Share based compensation by share based payment arrangement unrecognized compensation costs non vested options Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Share based compensation by share based payment arrangement contractual term Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share based compensation by share based payment arrangement vesting period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Share based compensation by share based payment arrangement unrecognized compensation costs weighted aveage period of recognition Common Stock, Capital Shares Reserved for Future Issuance Common stock, capital shares reserved for future issuance Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Outstanding Stock Maximum Cumulative Annual Increase Share based compensation arrangement by share based payment award Cumulative annual increase in shares reserved for issuance, percentage Share based compensation arrangement by share based payment award Cumulative annual increase in shares reserved for issuance, percentage. Share Based Compensation Arrangement By Share Based Payment Award Shares of Common Stock Outstanding Maximum Cumulative Annual Increase Share based compensation arrangement by share based payment award shares of common stock outstanding maximum cumulative annual increase Share based compensation arrangement by share based payment award shares of common stock outstanding maximum cumulative annual increase. Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Shares available for future grant Common stock shares reserved for future issuance Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Outstanding Common Stock Maximum Cumulative Annual Increase Share based compensation arrangement by share based payment award Cumulative annual increase in common stock shares reserved for issuance, percentage Share based compensation arrangement by share based payment award Cumulative annual increase in common stock shares reserved for issuance, percentage. Maximum Threshold Common Stock Issuable on Exercise of Incentive Stock Options Maximum threshold common stock issuable on exercise of incentive stock options Maximum threshold common stock issuable on exercise of incentive stock options. Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Share based compensation arrangement by share based payment award number of shares authorized Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Weighted average grant date fair value of options granted Stock Issued During Period, Shares, Employee Stock Purchase Plans Stock issued during period shares employee stock purchase plans Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Stock options outstanding, Shares Ending balance, Stock Options Beginning balance, Stock Options Plan Name [Axis] Plan Name [Domain] Two Thousand And Thirteen Amended And Restated Stock Performance Plan [Member] 2013 Amended And Restated Stock Performance Plan [Member] Two thousand and thirteen amended and restated stock performance plan. Two Thousand And Twenty One Equity Incentive Plan [Member] 2021 Equity Incentive Plan [Member] 2021 Equity incentive plan. Employee Stock Purchase Plan [Member] Two Thousand And Thirteen Plan [Member] Two thousand and thirteen plan [Member]. Two Thousand And Thirteen And Two Thousand And Twenty One Amended And Restated Stock Performance Plan Member [Member] 2013 and 2021 Amended And Restated Stock Performance Plan [Member] Two thousand and thirteen and two thousand and twenty one amended and restated stock performance plan. Two Thousand And Thirteen Two Thousand And Twenty One Equity Incentive Plan [Member] 2013 and 2021 Equity Incentive Plan [Member] 2013 and 2021 Equity incentive plan. Employee Stock [Member] New Shares [Member] New Shares. Black Scholes Option Pricing Model [Member] Black-Scholes Option-Pricing Model [Member] Black-Scholes option-pricing model. Third Party Valuation [Member] Third Party Valuation [Member] Third party valuation. Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Expected volatility 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, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, minimum Share Based Compensation By Share Based Payment Arrangement Expected Liquidity Time Expected time to liquidity event in years Share Based Compensation By Share Based Payment Arrangement Expected Liquidity Time. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Vested and exercisable, Weighted Average Remaining Contractual Life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Options granted, Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Vested and exercisable, Stock Options Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Options granted, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Vested and exercisable, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Vested and exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Beginning balance, Weighted Average Exercise Price Ending balance, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Ending balance, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Life (in years) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options Exercised, Weighted Average Exercise Price Share-based Payment Arrangement, Expense Share-based compensation expense Income Statement Location [Axis] Income Statement Location [Domain] General and Administrative Expense [Member] Research and Development Expense [Member] Research and Development Expense [Member] Other Commitments [Table] Lease Contractual Term [Axis] Lease Contractual Term [Domain] New Operating Sublease [Member] New Operating Sublease [Member] New operating sublease. Other Commitments [Line Items] Operating Lease Aggregate Minimum Rentals Payable Operating sublease minimum rent obligation over the remaining term Operating lease aggregate minimum rentals payable. Lessee, Operating Lease, Renewal Term Term of operating sublease Operating Leases, Rent Expense, Minimum Rentals Operating sublease monthly rent minimum Operating Leases, Future Minimum Payments, Due in Three Years Year ended December 31, 2023 Operating Leases, Future Minimum Payments Due Total Operating Leases, Future Minimum Payments, Remainder of Fiscal Year Year ended December 31, 2021 (remaining 3 months) Operating Leases, Future Minimum Payments, Due in Two Years Year ended December 31, 2022 Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Conversion of stock, shares converted Series A1 Preferred Stock [Member] Series A1 Preferred Stock [Member] Series A-1 preferred stock. Common Stock Warrant [Member] Common stock warrant [Member] Common stock warrant. Preferred Stock Warrant [Member] Preferred stock warrant [Member] Preferred stock warrant. Series A Preferred Stock [Member] Series A Preferred Stock [Member] Share-based Payment Arrangement, Option [Member] Exercise of Stock Options [Member]