Entity Central Index Key Cover [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Current Reporting Status Entity Current Reporting Status Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Shell Company Entity Shell Company Title of 12(b) Security Security12b Title Security Exchange Name Security Exchange Name Entity Interactive Data Current Entity Interactive Data Current Entity File Number Entity File Number Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Deferred offering costs noncurrent. Statement Of Financial Position [Abstract] Statement [Table] Statement [Table] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Voting common stock. Voting Common Stock Voting Common Stock [Member] Non-voting Common Stock Nonvoting Common Stock [Member] Statement [Line Items] Statement [Line Items] Assets Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Right-of-use asset Operating Lease Right Of Use Asset Deferred offering costs Deferred Offering Costs Non Current Total assets Assets Liabilities and stockholders’ equity Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued expenses and other current liabilities Accrued Liabilities Current Operating lease liability Operating Lease Liability Current Total current liabilities Liabilities Current Other liabilities Other Liabilities Noncurrent Operating lease liability Operating Lease Liability Noncurrent Total liabilities Liabilities Commitments (Note 7) Commitments And Contingencies Stockholders’ equity: Stockholders Equity [Abstract] Common stock Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity Stockholders Equity Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares, issued Common Stock Shares Issued Common stock, shares, outstanding Common Stock Shares Outstanding Income Statement [Abstract] Operating expenses: Operating Expenses [Abstract] Research and development Research And Development Expense General and administrative General And Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Other income, net Other Nonoperating Income Expense Net loss Net Income Loss Per share information: Earnings Per Share [Abstract] Net loss per share of common stock, basic and diluted Earnings Per Share Basic And Diluted Weighted average common shares outstanding, basic and diluted Weighted Average Number Of Share Outstanding Basic And Diluted Statement Of Stockholders Equity [Abstract] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Deficit Retained Earnings [Member] Series A convertible preferred stock. Series A Convertible Preferred Stock Series A Convertible Preferred Stock [Member] Series B convertible preferred stock. Series B Convertible Preferred Stock Series B Convertible Preferred Stock [Member] Convertible preferred stock, Beginning balance Temporary Equity Carrying Amount Attributable To Parent Convertible preferred stock, Beginning balance (shares) Temporary Equity Shares Outstanding Beginning balance Beginning balance (shares) Shares Outstanding Exercise of stock options Stock Issued During Period Value Stock Options Exercised Exercise of stock options (shares) Stock Issued During Period Shares Stock Options Exercised Sale of stock, net of offering costs Stock Issued During Period Value New Issues Sale of stock, net of offering costs, (shares) Stock Issued During Period Shares New Issues Stock-based compensation expense, including issuance of RSAs Stock Issued During Period Value Share Based Compensation Stock-based compensation expense, including issuance of RSAs (shares) Stock Issued During Period Shares Share Based Compensation Net loss Convertible preferred stock, Ending balance Convertible preferred stock, Ending balance (shares) Ending balance Ending balance (shares) Payments of offering costs. Sale of common stock, offering costs Payments Of Offering Costs Noncash lease expense. Increase decrease in operating lease liabilities. Offering costs in accounts payable. Offering costs in accrued expenses and other current liabilities. Statement Of Cash Flows [Abstract] Cash flows used in operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Net loss Profit Loss 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] Depreciation and amortization Depreciation Depletion And Amortization Noncash lease expense Noncash Lease Expense Stock-based compensation Share Based Compensation Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Prepaid expenses and other current assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable Increase Decrease In Accounts Payable Accrued expenses and other liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Operating lease liabilities Increase Decrease In Operating Lease Liabilities Net cash used in operating activities Net Cash Provided By Used In Operating Activities Cash flows used in investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchases of property and equipment Payments To Acquire Property Plant And Equipment Net cash used in investing activities Net Cash Provided By Used In Investing Activities Cash flows provided by financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from the sale of common stock, net of offering costs Proceeds From Issuance Of Common Stock Proceeds from the sale of convertible preferred stock, net of offering costs Proceeds From Issuance Of Convertible Preferred Stock Payment of capital lease obligation Repayments Of Long Term Capital Lease Obligations Proceeds from the exercise of stock options Proceeds From Stock Options Exercised Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Net increase in cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect Cash and cash equivalents at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash and cash equivalents at end of period Supplemental disclosures: Supplemental Cash Flow Information [Abstract] Property and equipment in accounts payable Capital Expenditures Incurred But Not Yet Paid Offering costs in accounts payable Offering Costs In Accounts Payable Offering costs in accrued expenses and other current liabilities Offering Costs In Accrued Expenses And Other Current Liabilities Background. Background [Abstract] Background Business Description And Basis Of Presentation [Text Block] Risks and liquidity. Risks and liquidity. Risks And Liquidity [Abstract] Risks and Liquidity Risks And Liquidity [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Accrued expenses and other current liabilities. Payables And Accruals [Abstract] Accrued Expenses and Other Current Liabilities Accrued Expenses And Other Current Liabilities [Text Block] Equity [Abstract] Common Stock Stockholders Equity Note Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments Commitments Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-Based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Basis of presentation Basis Of Accounting Policy Policy [Text Block] Use of estimates Use Of Estimates Income taxes Income Tax Policy [Text Block] Net Loss Per Share Earnings Per Share Policy [Text Block] Recently Issued Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Schedule of Potentially Dilutive Securities Excluded from Computation of Diluted Weighted-average Shares of Common Stock Outstanding Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Schedule of accrued expenses and other current liabilities. Summary of Accrued Expenses and Other Current Liabilities Schedule Of Accrued Expenses And Other Current Liabilities Table [Text Block] Schedule of Future Minimum Annual Lease Payments Under Noncancelable Lease Lessee Operating Lease Liability Maturity Table [Text Block] Schedule of Stock-Based Compensation Expense Recorded in Statements of Operations Schedule Of Compensation Cost For Share Based Payment Arrangements Allocation Of Share Based Compensation Costs By Plan Table [Text Block] Summary of Stock Option Activity Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Summary of Information about Stock Options Outstanding Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Text Block] Schedule of Fair Value of Each Option Estimated on Date of Grant Using Weighted Average Assumptions Schedule Of Share Based Payment Award Stock Options Valuation Assumptions Table [Text Block] Summary of Activity related to RSA Stock-Based Payment Awards Nonvested Restricted Stock Shares Activity Table [Text Block] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Unvested Restricted Stock Awards Restricted Stock [Member] Unvested Restricted Stock Units Restricted Stock Units R S U [Member] Stock Options Employee Stock Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of earnings per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Summary of significant accounting policies. Summary of significant accounting policies. Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Accounting Standards Update Adjustments For New Accounting Pronouncements [Axis] Accounting Standards Update Type Of Adoption [Member] ASU 2016-02 Accounting Standards Update201602 [Member] Summary of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Change in accounting principle, ASU, adopted Change In Accounting Principle Accounting Standards Update Adopted Change in accounting principle, ASU, adoption date Change In Accounting Principle Accounting Standards Update Adoption Date Change in accounting principle, ASU, immaterial effect Change In Accounting Principle Accounting Standards Update Immaterial Effect Offset accrued expense and other current liabilities to eliminate deferred rent. Operating lease liability Operating Lease Liability Offset accrued expense and other current liabilities to eliminate deferred rent Offset Accrued Expense And Other Current Liabilities To Eliminate Deferred Rent Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value Hierarchy and NAV Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy and NAV Fair Value Measurements Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value Inputs Level1 [Member] Significant other observable inputs (Level 2) Fair Value Inputs Level2 [Member] Significant unobservable inputs (Level 3) Fair Value Inputs Level3 [Member] Cash and Cash Equivalents Cash And Cash Equivalents [Axis] Cash and Cash Equivalents Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member] Money Market Funds Money Market Funds [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Fair value measurement, recurring basis, assets Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value Accrued research and development liabilities, current. Compensation and related benefits Employee Related Liabilities Current Research and development Accrued Research And Development Liabilities Current Other Other Accrued Liabilities Current Accrued expenses and other current liabilities Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] Public Offering I P O [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Minimum Minimum [Member] Maximum Maximum [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Shares of common stock Sale of stock, price per share Sale Of Stock Price Per Share Net proceeds from issuance of common stock Beneficial ownership percentage. Common stock, voting rights Common Stock Voting Rights Beneficial ownership percentage Beneficial Ownership Percentage Operating lease estimated incremental borrowing rate percent. Lease commencement date. Other Commitments [Table] Other Commitments [Table] Lease Contractual Term Lease Contractual Term [Axis] Lease Contractual Term Lease Contractual Term [Domain] Operating lease expiring december 2022. Operating Lease Expiring December 2022 Operating Lease Expiring December2022 [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Other Commitments [Line Items] Other Commitments [Line Items] Lease renewal period Lessee Operating Lease Renewal Term Operating lease estimated incremental borrowing rate percent Operating Lease Estimated Incremental Borrowing Rate Percent Lessee, operating lease, option to extend Lessee Operating Lease Option To Extend Noncancelable lease, period Lessee Operating Lease Term Of Contract Lease commencement date Lease Commencement Date Lease expiration date Lease Expiration Date1 Remaining operating lease payments due in 2021 Lessee Operating Lease Liability Payments Remainder Of Fiscal Year Operating lease payments due in 2022 Lessee Operating Lease Liability Payments Due Next Twelve Months Rent expense Operating Lease Expense 2021 (remaining) 2022 Total undiscounted lease payments Lessee Operating Lease Liability Payments Due Less imputed interest Lessee Operating Lease Liability Undiscounted Excess Amount Defined contribution plan, maximum annual contributions per employee, percent Defined Contribution Plan Maximum Annual Contributions Per Employee Percent Defined contribution plan, employer matching contribution, percent of employee's gross pay Defined Contribution Plan Employer Matching Contribution Percent Defined contribution plan, employer discretionary contribution amount Defined Contribution Plan Employer Discretionary Contribution Amount Number of equity incentive plans. Percentage of shares outstanding used to calculate annual increase in number of shares that can be issued. Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Vesting Vesting [Axis] Vesting Vesting [Domain] Vesting After One Year Share Based Compensation Award Tranche One [Member] Plan Name Plan Name [Axis] Plan Name Plan Name [Domain] Two thousand twenty equity incentive plan. 2020 Equity Incentive Plan Two Thousand Twenty Equity Incentive Plan [Member] Two thousand twenty employee stock purchase plan. 2020 Employee Stock Purchase Plan Two Thousand Twenty Employee Stock Purchase Plan [Member] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Stock Awards Restricted Stock Units Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Number of equity incentive plans Number Of Equity Incentive Plans Number of shares available for future grants Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Terms of award Share Based Compensation Arrangement By Share Based Payment Award Terms Of Award Award term Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period Percentage of shares outstanding used to calculate annual increase in number of shares that can be issued Percentage Of Shares Outstanding Used To Calculate Annual Increase In Number Of Shares That Can Be Issued Award vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Percentage of stock options vested Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage Shares issued Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Research and Development Research And Development Expense [Member] General and Administrative General And Administrative Expense [Member] Stock-based compensation expense Allocated Share Based Compensation Expense Number of shares, Outstanding at January 1, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Number of shares, Granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Number of shares, Exercised Number of shares, Forfeited Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Number of shares, Outstanding at June 30, 2021 Number of shares, Exercisable at June 30, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Weighted average exercise price per share, Outstanding at January 1, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Weighted average exercise price per share, Granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Weighted average exercise price per share, Exercised Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Weighted average exercise price per share, Forfeited Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Weighted average exercise price per share, Outstanding at June 30, 2021 Weighted average exercise price per share, Exercisable at June 30, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Weighted average remaining contractual term (years), Outstanding Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted average remaining contractual term (years), Exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Aggregate intrinsic value of outstanding options Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Aggregate intrinsic value of exercisable options Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Exercise Price Range Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Axis] Exercise Price Range Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Domain] Exercise price range one. $0.31 - $7.37 Exercise Price Range One [Member] Exercise price range two. $7.38 - $15.93 Exercise Price Range Two [Member] Exercise price range three. $15.94 - $88.98 Exercise Price Range Three [Member] Range of Exercise Prices, Minimum Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit Range of Exercise Prices, Maximum Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit Options Outstanding, Number Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options Options Outstanding, Weighted Average Remaining Contractual Life (in years) Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 Options Outstanding, Weighted Average Exercise Price Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 Options Exercisable, Number Exercisable Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options Options Exercisable, Weighted Average Exercise Price Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 Weighted-average grant date fair value of options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value Aggregate intrinsic value of options exercised Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value Total unrecognized compensation expense related to unvested stock option awards Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Total unrecognized compensation expense, weighted-average period Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Expected volatility Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Risk-free interest rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Expected life (in years) Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 Expected dividend yield Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate Number of shares, Unvested balance at January 1, 2021 Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number Number of shares, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Number of shares, Unvested balance at June 30, 2021 Weighted-average grant date fair value, Unvested balance at January 1, 2021 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 fair value, Vested Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value Weighted-average grant date fair value, Unvested balance at June 30, 2021 Share-based payment arrangement, nonvested award, unrecognized expense Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Share Based Awards Other Than Options Shares, granted Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period