Document and Entity Information [Abstract] Document Type Document Quarterly Report Document Transition Report Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, Country 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 Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Condensed Consolidated Balance Sheets Statement [Table] Statement [Line Items] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Marketable Securities, Current Marketable securities Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Total Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and stockholders' equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Other Liabilities, Current Other current liabilities Total Liabilities, Current Total current liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies (Note 11) Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of June 30, 2021 and December 31, 2020; no shares issued and outstanding as of June 30, 2021 and December 31, 2020. Common Stock, Value, Issued Common stock, $0.0001 par value; 490,000,000 shares authorized as of June 30, 2021 and December 31, 2020; 40,256,637 and 40,169,738 shares issued as of June 30, 2021 and December 31, 2020, respectively; 39,552,588 and 39,308,238 shares outstanding as of June 30, 2021 and December 31, 2020, respectively. Additional Paid in Capital Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Balances, at End of period Balances, at Beginning of period Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, authorized (in shares) Preferred stock, authorized Preferred Stock, Shares Issued Preferred stock, issued (in shares) Preferred Stock, Shares Outstanding Preferred stock, outstanding (in shares) Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common stock, par value Common Stock, Shares Authorized Common stock, authorized (in shares) Common stock, authorized Common Stock, Shares, Issued Common stock, issued (in shares) Common Stock, Shares, Outstanding Common stock, outstanding (in shares) Condensed Consolidated Statements of Operations Operating Expenses [Abstract] Operating expenses: Research and Development Expense Research and development General and Administrative Expense General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Loss from operations Nonoperating Income (Expense) [Abstract] Other income (expense): Investment Income, Interest Interest income Interest Expense Interest expense Other Nonoperating Income (Expense) Other income (expense) Nonoperating Income (Expense) Total other income (expense), net Net Income (Loss) Attributable to Parent Net loss Net loss Net loss Earnings Per Share, Basic Net loss per share, basic Earnings Per Share, Diluted Net loss per share, diluted Weighted Average Number of Shares Outstanding, Basic Weighted average shares used to compute net loss per share, basic Weighted Average Number of Shares Outstanding, Diluted Weighted average shares used to compute net loss per share, diluted Condensed Consolidated Statements of Comprehensive Loss Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive loss: Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Net unrealized loss on marketable securities Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive loss Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) Increase (Decrease) in Stockholders' Equity [Roll Forward] Shares, Outstanding Balances, at End of period (in shares) Balances, at Beginning of period (in shares) Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature Beneficial conversion option recognized upon issuance of 2020 convertible notes Amount of decrease in additional paid in capital (APIC) resulting from recognition of beneficial conversion option upon repurchase of convertible debt. Adjustments to Additional Paid in Capital, Repurchase of Convertible Debt with Conversion Feature Beneficial conversion option recognized upon repurchase of 2020 convertible notes on settlement date Amount of increase in additional paid in capital (APIC) resulting from extinguishment of convertible notes. Adjustments to Additional Paid in Capital, Extinguishment of Convertible Notes Extinguishment of 2020 convertible notes Stock Issued During Period, Value, New Issues Net proceeds Issuance of Series B convertible stock, net of issuance costs Stock Issued During Period, Shares, New Issues Shares issued Issuance of Series B convertible stock, net of issuance costs (in shares) Value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Value Vesting of early exercised stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Number of shares vested Vesting of early exercised stock options (in shares) Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised (in shares) Exercise of stock options (in shares) Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of shares under the employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of shares under the employee stock purchase plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (in shares) Vesting of restricted stock awards APIC, Share-based Payment Arrangement, Increase for Cost Recognition Stock-based compensation expense APIC, Share-based Payment Arrangement, ESPP, Increase for Cost Recognition Employee stock purchase plan expense Increase (Decrease) in Temporary Equity [Roll Forward] Temporary Equity, Carrying Amount, Attributable to Parent Balances, at End of period Balances, at Beginning of period Temporary Equity, Shares Outstanding Balances, at End of period (in shares) Balances, at Beginning of period (in shares) Convertible preferred stock, outstanding (in shares) Temporary Equity, Stock Issued During Period, Value, New Issues Issuance of Series B convertible preferred stock, net of issuance costs Number of new stock classified as temporary equity issued during the period. Temporary Equity, Stock Issued During Period, Shares, New Issues Issuance of Series B convertible preferred stock, net of issuance costs (in shares) The gross value of convertible stock issued during the period upon the conversion of convertible debt. Temporary Equity, Stock Issued During Period, Value, Conversion of Convertible Debt Issuance of Series B convertible preferred stock in connection with the conversion of convertible notes Number of convertible shares issued during the period as a result of the conversion of convertible debt. Temporary Equity, Stock Issued During Period, Shares, Conversion of Convertible Debt Issuance of Series B convertible preferred stock in connection with the conversion of convertible notes (in shares) Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Stock issuance costs Condensed Consolidated Statements of cash flows 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: Depreciation, Depletion and Amortization Depreciation and amortization expense Paid-in-Kind Interest Non-cash interest expense Accretion (Amortization) of Discounts and Premiums, Investments Premium amortization and discount accretion on marketable securities, net Share-based Payment Arrangement, Noncash Expense Stock-based compensation expense, including employee stock purchase plan expense Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses, other current assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Other Current Liabilities Other current liabilities Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Purchase of equipment Proceeds from Sale and Maturity of Marketable Securities Maturities of marketable securities Payments to Acquire Marketable Securities Purchases of marketable securities Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from Stock Options Exercised Proceeds from exercise of stock options The cash inflow from issuance of common stock under employee stock purchase plan during the period. Proceeds from Issuance of Common Stock Under Employee Stock Purchase Plan Proceeds from issuance of common stock under employee stock purchase plan Proceeds from Convertible Debt Proceeds from the issuance of convertible notes Proceeds from Issuance of Convertible Preferred Stock Proceeds from issuance of Series B convertible preferred stock, net of issuance costs Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Noncash Investing and Financing Items [Abstract] Supplemental disclosure of non-cash investing and financing activities: Purchases of property and equipment included in accounts payable and accrued liabilities Conversion of Stock, Amount Converted Conversion of convertible notes into Series B convertible preferred stock Conversion value The amount of non cash offering costs included in other current liabilities. Non Cash Offering Costs Included in Other Current Liabilities Offering costs included in other current liabilities - Series B Non-cash acquired from the vesting of early exercised stock options. Vesting Of Early Exercised Stock Options Vesting of early exercised stock options Nature of the Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] Nature of the Business and Basis of Presentation Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Fair Value Measurement Fair Value Disclosures [Text Block] Fair Value Measurement Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Property and Equipment, net Prepaid Expenses and Other Current Assets The entire disclosure for prepaid expenses and other current assets. Prepaid Expenses and Other Current Assets [Text Block] Prepaid Expenses and Other Current Assets Other Current Liabilities Other Liabilities Disclosure [Text Block] Other Current Liabilities Convertible Notes Debt Disclosure [Text Block] Convertible Notes Convertible Preferred Stock. Preferred Stock [Text Block] Convertible Preferred Stock Stock-Based Compensation Share-based Payment Arrangement [Text Block] Stock-Based Compensation Net Loss Per Share Earnings Per Share [Text Block] Net Loss Per Share Commitments and Contingencies. Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure of accounting policy for basis of presentation and consolidation. Basis of Presentation and Consolidation, Policy [Policy Text Block] Basis of Presentation and Consolidation Disclosure of accounting policy for unaudited interim financial information . Unaudited Interim Financial Information, Policy [Policy Text Block] Unaudited Interim Financial Information Use of Estimates, Policy [Policy Text Block] Use of Estimates Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Marketable Securities, Policy [Policy Text Block] Marketable Securities Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Credit Risk and Other Risks and Uncertainties Research and Development Expense, Policy [Policy Text Block] Research and Development Costs Disclosure of accounting policy for research contract costs and accruals . Research Contract Costs and Accruals, Policy [Policy Text Block] Research Contract Costs and Accruals Earnings Per Share, Policy [Policy Text Block] Net Loss Per Common Share New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of financial assets and liabilities measured at fair value on a recurring basis Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of financial assets reconciliation Property, Plant and Equipment [Table Text Block] Schedule of property and equipment, net Tabular disclosure of the carrying amounts of prepaid expenses and other current assets. Schedule of Prepaid Expenses and Other Current Assets [Table Text Block] Schedule of prepaid expenses and other current assets Other Current Liabilities [Table Text Block] Schedule of other current liabilities Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of fair value assumptions Share-based Payment Arrangement, Option, Activity [Table Text Block] Schedule of stock option activity Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Summary of restricted stock activity Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Schedule of stock-based compensation expense Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of basic and diluted net loss per common share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of anti-dilutive securities excluded from computation of earnings per share Contractual Obligation, Fiscal Year Maturity [Table Text Block] Schedule of future contractual obligations and commitments Number of Operating Segments Number of operating segments Number of Reportable Segments Number of reportable segments Shares Issued, Price Per Share Share price The amount of underwriting discounts and commissions and offering costs incurred during IPO. Underwriting Discounts, Commissions and Offering Costs Offering costs Conversion of Stock, Shares Converted Number of shares converted Conversion of Stock, Shares Issued Shares issued upon conversion Cash, Cash Equivalents, and Short-term Investments Cash, cash equivalents and marketable securities Fair Value, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets, Fair Value Disclosure [Abstract] Assets Cash and Cash Equivalents, Fair Value Disclosure Cash Investments, Fair Value Disclosure Marketable securities