SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION: Supplemental Cash Flow Information [Abstract] Net Loss Per Share Earnings Per Share, Policy [Policy Text Block] Restricted common stock vested (in shares) Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Leasehold improvements Leasehold Improvements [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Net loss Net loss Net loss Net Income (Loss) Attributable to Parent Entity Emerging Growth Company Entity Emerging Growth Company Operating lease right-of-use asset Operating Lease, Right-of-Use Asset Marketable securities Debt Securities, Available-for-sale, Current Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Accrued compensation Employee-related Liabilities, Current Income Statement Location [Axis] Income Statement Location [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Segments Segment Reporting, Policy [Policy Text Block] Forfeited (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Entity Filer Category Entity Filer Category Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Beginning balance, convertible preferred stock (in shares) Ending balance, convertible preferred stock (in shares) Convertible preferred stock, shares outstanding (in shares) Temporary Equity, Shares Outstanding Other assets Other Assets, Noncurrent Free rent period Lessee, Operating Lease, Free Rent Period Lessee, Operating Lease, Free Rent Period Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Expected dividend yield Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Net increase in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Maximum milestone payments for licensed products Research and Development Arrangement, Contract to Perform for Others. Maximum Product Milestone Payments Research and Development Arrangement, Contract to Perform for Others. Maximum Product Milestone Payments Stock-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Intrinsic value of options exercised during the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Summary of Marketable Securities Debt Securities, Available-for-sale [Table Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Organization, Consolidation and Presentation of Financial Statements [Abstract] Variable lease cost Variable Lease, Cost Potentially antidilutive shares excluded from the calculation of net loss per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Research and development Research and Development Expense [Member] Sale of Stock [Axis] Sale of Stock [Axis] Lapse of repurchase rights related to common stock issued pursuant to early exercises Stock Issued During Period, Lapse Of Repurchase Rights Pursuant To Early Stock Exercises Stock Issued During Period, Lapse Of Repurchase Rights Pursuant To Early Stock Exercises Cash and Cash Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Reverse stock split ratio for capital stock Stockholders' Equity Note, Stock Split, Conversion Ratio Private placement Private Placement [Member] Granted (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Proceeds from maturities of marketable securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Unrealized gains on marketable securities Unrealized gain (loss) on marketable securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Award Type [Domain] Award Type [Domain] Increase in shares available for grant, percentage of shares outstanding Share-based Compensation Arrangement by Share-based Payment Award, Increase In Number Of Shares Available For Grant, Percentage Of Shares Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Increase In Number Of Shares Available For Grant, Percentage Of Shares Outstanding ASSETS Assets [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] 2017 Equity Incentive Plan 2017 Equity Incentive Plan [Member] 2017 Equity Incentive Plan Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Preferred stock, $0.0001 par value; 10,000,000 shares authorized at June 30, 2021 and December 31, 2020; no shares issued and outstanding at June 30, 2021 and December 31, 2020; Preferred Stock, Value, Issued Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Beginning balance, number of options (in shares) Ending balance, number of options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Entity Address, City or Town Entity Address, City or Town Accumulated Deficit Retained Earnings [Member] IPO IPO [Member] Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Third Anniversary Third Anniversary [Member] Third Anniversary Issuance of shares of common stock for sales agreement Sale Of Stock, Authorized Consideration On Transaction Sale Of Stock, Authorized Consideration On Transaction Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Conversion of preferred stock into common stock upon initial public offering Stock Issued During Period, Value, Conversion of Convertible Securities Capitalization of leasehold improvements Lessee, Operating Lease, Tenant Improvement Allowance, Capitalization In Excess Lessee, Operating Lease, Tenant Improvement Allowance, Capitalization In Excess Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Ownership percentage of VIE Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Right-of-use asset obtained in exchange for lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Vesting rights, percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Commitments and Contingencies Disclosure [Abstract] Entity Interactive Data Current Entity Interactive Data Current Number of operating segments (segment) Number of Operating Segments Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Net loss per share, basic (in USD per share) Earnings Per Share, Basic Straight-line rent expense Operating Lease, Expense Proceeds from issuance of common stock pursuant to employee stock purchase plan Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding Option Exercised 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Hengrui Hengrui [Member] Hengrui Early exercise liability Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent Preclinical and Clinical Accruals and Costs Preclinical And Clinical Accruals And Costs [Policy Text Block] Preclinical And Clinical Accruals And Costs Number of shares authorized for sale under the ESPP (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Base Amount Of Common Stock Shares Authorized Share-based Compensation Arrangement by Share-based Payment Award, Base Amount Of Common Stock Shares Authorized Beginning balance (in shares) Ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Document Type Document Type Share sales agreement, percentage of gross sales price Sale Of Stock, Agent Fee, Percentage Of Gross Proceeds Sale Of Stock, Agent Fee, Percentage Of Gross Proceeds Hawkeye Hawkeye [Member] Hawkeye Number of Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Current Reporting Status Entity Current Reporting Status Prepaid clinical trial costs Prepaid Clinical Trial Test Costs, Current Prepaid Clinical Trial Test Costs, Current Subsequent Anniversaries Subsequent Anniversaries [Member] Subsequent Anniversaries Commercial paper Commercial Paper [Member] Cash paid for amounts included in the measurement of lease liabilities Operating Lease, Payments Restricted cash Restricted Cash and Cash Equivalents Research and Development Research and Development Expense, Policy [Policy Text Block] Convertible preferred stock, par value (In USD per share) Temporary Equity, Par or Stated Value Per Share Grant date fair value of options vested during the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Plan Name [Axis] Plan Name [Axis] Early exercise liability, current Deferred Compensation Share-based Arrangements, Liability, Current Total assets Assets, Fair Value Disclosure Level 1 Fair Value, Inputs, Level 1 [Member] CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Document Transition Report Document Transition Report Total liabilities and stockholders’ equity Liabilities and Equity Accrued expenses and other current liabilities Other Accrued Liabilities, Current Reduction of right-of-use asset upon reassessment of lease term Reduction Of Right-of-Use Asset Upon Reassessment Of Lease Term Reduction Of Right-of-Use Asset Upon Reassessment Of Lease Term First anniversary date Share-based Payment Arrangement, Tranche One [Member] Exercised (in USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Additional paid-in capital Additional Paid in Capital Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Service Condition Restricted Stock Service Condition Restricted Stock [Member] Service Condition Restricted Stock Unaudited Interim Condensed Financial Statements Unaudited Interim Condensed Financial Statements, Policy [Policy Text Block] Unaudited Interim Condensed Financial Statements, Policy Proceeds from initial public offering, net of issuance costs Proceeds from Issuance Initial Public Offering Accounts payable Increase (Decrease) in Accounts Payable Net Loss Per Share Earnings Per Share [Text Block] Maximum shares to be issued Share-based Compensation Arrangement By Share-based Payment Award, Maximum Shares Issuable Share-based Compensation Arrangement By Share-based Payment Award, Maximum Shares Issuable Operating expenses: Operating Expenses [Abstract] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Issuance of shares of common stock upon the exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Minimum Minimum [Member] Organization and Description of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Components of Shares of Stock for Issuance Schedule of Stock by Class [Table Text Block] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Unrealized gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Early exercise liability, noncurrent Deferred Compensation Share-based Arrangements, Liability, Classified, Noncurrent Trading Symbol Trading Symbol Lease Description [Domain] Lease Description [Domain] Lease Description Current liabilities: Liabilities, Current [Abstract] Issuance of shares of common stock for public offering, net of issuance costs Stock Issued During Period, Value, New Issues General and administrative General and Administrative Expense Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Exercisable, Weighted-Average Exercise Price (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Stock-Based Compensation Share-based Payment Arrangement [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Leases Lessee, Leases [Policy Text Block] Accounting Policies [Abstract] Increase (decrease) of restricted investments Increase (Decrease) of Restricted Investments Remaining Contractual Term (Years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Stock issuance costs Payments of Stock Issuance Costs Issuance of shares of common stock for public offering, net of issuance costs (in shares) Stock Issued During Period, Shares, New Issues Present value of future minimum lease payments Total operating lease liability Operating Lease, Liability Common stock, $0.0001 par value; 300,000,000 shares authorized at June 30, 2021 and December 31, 2020; 50,231,433 and 43,677,817 shares issued at June 30, 2021 and December 31, 2020, respectively; 50,045,602 and 43,338,438 shares outstanding at June 30, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Other income, net Nonoperating Income (Expense) Recognition period for unrecognized compensation costs related to unvested options expected to vest Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Collaboration agreement, threshold of proceeds from stock issuance for additional consideration Collaboration Agreement, Threshold Of Proceeds From Stock Issuance For Additional Consideration Collaboration Agreement, Threshold Of Proceeds From Stock Issuance For Additional Consideration Maximum product milestone payments upon first product approval Research and Development Arrangement, Contract to Perform for Others, Maximum Product Milestone Payments Upon First Product Approval Research and Development Arrangement, Contract to Perform for Others, Maximum Product Milestone Payments Upon First Product Approval Beginning balance (in USD per share) Ending balance (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Commitments and Contingencies Commitments and Contingencies Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax 2021 (July through December) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Restricted stock Restricted Stock [Member] Assumptions in Calculating Stock Option Awards Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Document Period End Date Document Period End Date Conversion of preferred stock into common stock upon initial public offering (in shares) Temporary Equity, Shares, Conversion Of Convertible Securities Temporary Equity, Shares, Conversion Of Convertible Securities Marketable Securities Marketable Securities, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Entity Registrant Name Entity Registrant Name Conversion of preferred stock into common stock upon initial public offering Temporary Equity, Value, Conversion Of Convertible Securities Temporary Equity, Value, Conversion Of Convertible Securities Less: Amounts representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Options issued and outstanding Stock Options Issued and Outstanding [Member] Stock Options Issued and Outstanding Prepaid expenses and other current assets Total prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Financial Instrument [Axis] Financial Instrument [Axis] Beginning Balance Ending Balance Temporary Equity, Carrying Amount, Attributable to Parent Number of shares vesting on a monthly basis (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Vesting On A Monthly Basis Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Vesting On A Monthly Basis Accrued liabilities Total accrued liabilities Accrued Liabilities, Current Common stock awards available for grant under employee benefit plans Stock Awards, Future Grant [Member] Stock Awards, Future Grant Square footage of leased space (in square feet) Lessee, Operating Lease, Square Footage Of Leased Space Lessee, Operating Lease, Square Footage Of Leased Space License agreement, cash payment Research and Development Arrangement, Contract to Perform for Others, Costs Incurred, Gross Stock Options Stock options to purchase common stock Share-based Payment Arrangement, Option [Member] Equity [Abstract] Collaborative arrangement, numerator for determining additional consideration Collaborative Arrangement, Numerator For Determining Additional Consideration Collaborative Arrangement, Numerator For Determining Additional Consideration Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] At-The-Market At-The-Market [Member] At-The-Market Common Stock Common Stock [Member] Second Anniversary Second Anniversary [Member] Second Anniversary Loss from operations Operating Income (Loss) Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Based number of options issuable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Base Number Of Options Issuable Share-based Compensation Arrangement by Share-based Payment Award, Base Number Of Options Issuable Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Operating lease liability Current portion operating lease liability Operating Lease, Liability, Current Unrealized losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax License Agreements Collaborative Arrangement Disclosure [Text Block] Preferred stock issued Temporary Equity, Stock Issued During Period, Value, New Issues Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Realized gains (losses) on investments Debt Securities, Available-for-sale, Realized Gain (Loss) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Property, Plant and Equipment [Abstract] Third Equity Public Offering Third Equity Public Offering [Member] Third Equity Public Offering Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense 2020 Equity Incentive Plan 2020 Equity Incentive Plan [Member] 2020 Equity Incentive Plan Additional Paid-In Capital Additional Paid-in Capital [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Depreciation Depreciation Secondary Equity Public Offering Secondary Equity Public Offering [Member] Secondary Equity Public Offering Accrued liabilities Increase (Decrease) in Accrued Liabilities Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-sale Period after tenant improvements (in days) Lessee, Operating Lease, Payment Period After Tenant Improvements Lessee, Operating Lease, Payment Period After Tenant Improvements Prepaid insurance Prepaid Insurance Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Maximum Maximum [Member] Share-based Payment Arrangement [Abstract] Total liabilities Liabilities Initial base rent Lessee, Operating Lease, Initial Base Rent Lessee, Operating Lease, Initial Base Rent Legal Entity [Axis] Legal Entity [Axis] Summary of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Award Type [Axis] Award Type [Axis] Granted (in USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Operating Lease Payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Total stockholders’ equity Beginning Balance Ending Balance Stockholders' Equity Attributable to Parent Balance Sheet Related Disclosures [Abstract] Balance Sheet Related Disclosures [Abstract] Operating lease liabilities Increase (Decrease) in Operating Lease Liabilities Increase (Decrease) in Operating Lease Liabilities Common stock, shares, issued (in shares) Common Stock, Shares, Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Intrinsic value, exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Useful life (in years) Property, Plant and Equipment, Useful Life Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Software Software and Software Development Costs [Member] Concentration of Credit Risk and Other Risks and Uncertainties Concentration Risk, Credit Risk, Policy [Policy Text Block] Risk-free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Operating lease liability, noncurrent Operating Lease, Liability, Noncurrent Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum City Area Code City Area Code Accumulated deficit Retained Earnings (Accumulated Deficit) Stock options to purchase common stock Share-based Payment Arrangement [Member] Lease term (in months) Lessee, Operating Lease, Term of Contract Restricted stock units outstanding RSU's subject to future vesting Restricted Stock Units (RSUs) [Member] Statement of Stockholders' Equity [Abstract] Shares issued pursuant to the employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Monthly basis Share-based Payment Arrangement, Tranche Two [Member] U.S. Treasury securities US Treasury Securities [Member] Amendment Flag Amendment Flag Reduction in right-of-use asset upon reassessment of lease term Reduction In Right-Of-Use Asset Upon Reassessment Of Lease Term Reduction In Right-Of-Use Asset Upon Reassessment Of Lease Term Proceeds from issuance of common stock upon exercise of stock options Proceeds from Stock Options Exercised Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Issuance of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Forfeited (in USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Maximum milestone payments for net worldwide sales Research and Development Arrangement, Contract to Perform for Others, Maximum Sales Milestone Payments Research and Development Arrangement, Contract to Perform for Others, Maximum Sales Milestone Payments Equity Components [Axis] Equity Components [Axis] Fair Value Disclosures [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total current assets Assets, Current Total minimum lease payments Lessee, Operating Lease, Liability, to be Paid Sale of Stock [Domain] Sale of Stock [Domain] Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Entity File Number Entity File Number Stock-Based Compensation Share-based Payment Arrangement [Policy Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Statement of Financial Position [Abstract] AstraZeneca AstraZeneca [Member] AstraZeneca Number of shares held in VIE (in shares) Variable Interest Entities, Number Of Shares Held Variable Interest Entities, Number Of Shares Held Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Vested (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Summary of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Entity Small Business Entity Small Business Preferred stock, par value (in USD per share) Preferred Stock, Par or Stated Value Per Share Cowen Cowen And Company LLC [Member] Cowen And Company LLC Grant date fair value of options vested during the period (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Shares of restricted stock issued to founders (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Clinical trial accruals Clinical Trial Accrual, Current Clinical Trial Accrual, Current Schedule of Research and Development Arrangement, Contract to Perform for Others [Table] Schedule of Research and Development Arrangement, Contract to Perform for Others [Table] Entity Ex Transition Period Entity Ex Transition Period Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Incremental cost of plan modification Share-based Payment Arrangement, Plan Modification, Incremental Cost Statement [Line Items] Statement [Line Items] Weighted- Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Series B Preferred Stock Series B Preferred Stock [Member] Performance Condition Restricted Stock Performance Condition Restricted Stock [Member] Performance Condition Restricted Stock Estimated fair value Debt Securities, Available-for-sale Counterparty Name [Domain] Counterparty Name [Domain] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Entity Address, State or Province Entity Address, State or Province Purchase price of common stock, as a percentage of closing trading price per share Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Preferred stock issued (in shares) Temporary Equity, Stock Issued During Period, Shares, New Issues Temporary Equity, Stock Issued During Period, Shares, New Issues Level 2 Fair Value, Inputs, Level 2 [Member] Emerging Growth Company Status Emerging Growth Company Status [Policy Text Block] Emerging Growth Company Status Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Entity [Domain] Entity [Domain] Amortized cost Debt Securities, Available-for-sale, Amortized Cost Use of Estimates Use of Estimates, Policy [Policy Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Entity Shell Company Entity Shell Company Local Phone Number Local Phone Number Stock-Based Compensation Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Vesting [Axis] Vesting [Axis] Proceeds from issuance of common stock, net of issuance costs Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Total assets Assets Plan Name [Domain] Plan Name [Domain] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Restricted Stock Unit Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Research and development Research and Development Expense Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Lease Description [Axis] Lease Description [Axis] Lease Description Renewal term Lessee, Operating Lease, Renewal Term Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Tax credits Tax Credit Carryforward, Amount Furniture and fixtures Furniture and Fixtures [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Operating Lease Supplemental Cash Flow Information Lease, Cost [Table Text Block] Entity Tax Identification Number Entity Tax Identification Number Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Lease Contractual Term [Domain] Lease Contractual Term [Domain] Weighted-average shares used in computing net loss per share, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Net loss per share, diluted (in USD per share) Earnings Per Share, Diluted Stock price (in USD per share) Sale of Stock, Price Per Share Non-cash lease expense Operating Lease, Right-of-Use Asset, Amortization Expense Vesting [Domain] Vesting [Domain] Convertible preferred stock, shares authorized (in shares) Temporary Equity, Shares Authorized Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Vesting period of stock-based awards granted Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period First Anniversary First Anniversary [Member] First Anniversary Unrecognized tax benefits, income tax penalties and interest expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Conversion of preferred stock into common stock upon initial public offering (in shares) Shares issued as a result of conversion of promissory notes (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Corporate debt securities Corporate Debt Securities [Member] Fair Value Measurements Fair Value Disclosures [Text Block] Accounts payable Accounts Payable, Current Fair Value of Assets Measured on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Dividends declared Dividends Payable Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Financial Instruments [Domain] Financial Instruments [Domain] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Cash and cash equivalents and debt securities, available for sale Cash And Cash Equivalents And Debt Securities, Available For Sale, Fair Value Disclosure Cash And Cash Equivalents And Debt Securities, Available For Sale, Fair Value Disclosure Payments, milestones or royalties Research And Development Arrangement, Payments, Milestones, Or Royalties Research And Development Arrangement, Payments, Milestones, Or Royalties Lease Contractual Term [Axis] Lease Contractual Term [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Tangible asset impairment charges Tangible Asset Impairment Charges Property and Equipment Property, Plant and Equipment [Table Text Block] Income Statement Location [Domain] Income Statement Location [Domain] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Convertible Preferred Stock Stockholders' Equity Note, Redeemable Preferred Stock, Issue, Policy [Policy Text Block] Number of additional shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Property, plant, and equipment, net Property and equipment, net Property, Plant and Equipment, Net Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Other prepaid expenses and current assets Other Prepaid Expense, Current Total operating expenses Operating Expenses Other long-term liabilities Other Liabilities, Noncurrent Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Westlake Village, California Lease Arrangement Westlake Village, California Lease Arrangement [Member] Westlake Village, California Lease Arrangement Cash, cash equivalents, restricted cash and marketable securities Cash And Cash Equivalents, Restricted Cash And Cash Equivalents, And Short-Term Investments Cash And Cash Equivalents, Restricted Cash And Cash Equivalents, And Short-Term Investments Earnings Per Share [Abstract] Property and equipment, gross Property, Plant and Equipment, Gross Available letter of credit Lessee, Operating Lease, Letter Of Credit Requirement Lessee, Operating Lease, Letter Of Credit Requirement Document Quarterly Report Document Quarterly Report Vesting of founder shares subject to repurchase (in shares) Stock Issued During Period, Vesting Of Founder Shares Subject To Repurchase, Shares Stock Issued During Period, Vesting Of Founder Shares Subject To Repurchase, Shares Lease term prior to termination option Lessee, Operating Lease, Term For Termination Option Lessee, Operating Lease, Term For Termination Option Beginning balance, weighted-average exercise price (in USD per share) Ending balance, weighted-average exercise price (in USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Stock-based compensation expense Share-based Payment Arrangement, Expense Remaining contractual term, exercisable (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Decrease in restricted cash Increase (Decrease) in Restricted Cash Per share information: Earnings Per Share, Basic and Diluted [Abstract] Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Weighted-Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Net amortization/accretion on marketable securities Accretion (Amortization) of Discounts and Premiums, Investments Counterparty Name [Axis] Counterparty Name [Axis] Construction in process Construction in Progress [Member] Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Lapse of repurchase rights related to common stock issued pursuant to early exercises (in shares) Stock Issued During Period, Lapse of Repurchase Rights Related to Common Stock Issued Pursuant to Early Exercises, Shares Stock Issued During Period, Lapse of Repurchase Rights Related to Common Stock Issued Pursuant to Early Exercises, Shares Number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Allowance for credit loss Debt Securities, Available-for-sale, Allowance for Credit Loss Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Current assets: Assets, Current [Abstract] Research and Development Arrangement, Contract to Perform for Others [Line Items] Research and Development Arrangement, Contract to Perform for Others [Line Items] Common stock reserved (in shares) Common Stock, Capital Shares Reserved for Future Issuance Early exercised options subject to future vesting Early Exercised Options [Member] Early Exercised Options Entity Central Index Key Entity Central Index Key Fourth Anniversary Fourth Anniversary [Member] Fourth Anniversary Income Taxes Income Tax, Policy [Policy Text Block] Security Exchange Name Security Exchange Name Money market funds Cash and cash equivalents, estimated fair value Cash and Cash Equivalents, Fair Value Disclosure Issuance of common stock upon the exercise of stock options (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Weighted-average shares used in computing net loss per share, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Underwriters' option Over-Allotment Option [Member] Current Fiscal Year End Date Current Fiscal Year End Date Stock Option Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Convertible Preferred Stock and Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Schedule of Potentially Antidilutive Shares Excluded from the Calculation of Diluted Net Loss Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Statement of Cash Flows [Abstract] Class of Stock [Line Items] Class of Stock [Line Items] 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 Shares issued pursuant to the employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Schedule of Prepaid Expenses and Other Current Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] 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 ESPP shares subject to future issuance Employee Stock [Member] Class of Stock [Domain] Class of Stock [Domain] Tenant improvement allowance Lessee, Operating Lease, Tenant Improvement Allowance Lessee, Operating Lease, Tenant Improvement Allowance Money market funds Money Market Funds [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Title of 12(b) Security Title of 12(b) Security Statement [Table] Statement [Table] Unrealized gains on marketable securities Marketable Securities, Unrealized Gain (Loss) Recently Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fifth Anniversary Fifth Anniversary [Member] Fifth Anniversary Statistical Measurement [Axis] Statistical Measurement [Axis] Votes per share of common stock Common Stock, Voting Rights, Number Of Votes Per Share Common Stock, Voting Rights, Number Of Votes Per Share Cover [Abstract] 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] Computer hardware Computer Equipment [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four