Entity Central Index Key Cover [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Entity File Number Entity File Number Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address Address Line1 Entity Address, Address Line Two Entity Address Address Line2 Entity Address, City or Town Entity Address City Or Town Entity Address, State or Province Entity Address State Or Province Entity Interactive Data Current Entity Interactive Data Current Entity Address, Postal Zip Code Entity Address Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Entity Incorporation, State or Country Code Entity Incorporation State Country Code Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Title of 12(b) Security Security12b Title Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Accrued and other liabilities current. Statement Of Financial Position [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Short-term investments Short Term Investments Accounts receivable Accounts Receivable Net Current Contract assets Contract With Customer Asset Net Income tax receivable Income Tax Receivable Prepaid expenses and other current assets Prepaid Expense And Other Assets Current Total current assets Assets Current Long-term investments Long Term Investments Property and equipment, net Property Plant And Equipment Net Restricted cash Restricted Cash Noncurrent Other assets Other Assets Noncurrent Total assets Assets Current liabilities: Liabilities Current [Abstract] Accounts payable Accounts Payable Current Accrued and other current liabilities Accrued And Other Liabilities Current Deferred revenue, current Contract With Customer Liability Current Total current liabilities Liabilities Current Deferred revenue, net of current portion Contract With Customer Liability Noncurrent Other long-term liabilities Other Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 6) Commitments And Contingencies Stockholders’ equity (deficit): Stockholders Equity [Abstract] Preferred stock, $0.001 par value— 10,000,000 shares authorized as of May 31, 2021 and November 30, 2020; 0 shares issued and outstanding as of May 31, 2021 and November 30, 2020 Preferred Stock Value Common stock, $0.001 par value— 500,000,000 shares authorized as of May 31, 2021 and November 30, 2020; 44,403,547 and 38,864,872 shares issued and outstanding as of May 31, 2021 and November 30, 2020, respectively Common Stock Value Additional paid-in-capital Additional Paid In Capital Common Stock Accumulated other comprehensive income Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated deficit Retained Earnings Accumulated Deficit Total stockholders’ equity Stockholders Equity Total liabilities and stockholders’ equity Liabilities And Stockholders Equity Preferred stock, par value 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 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] Collaboration revenue Revenues 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 Interest and other income, net Interest And Other Income Loss before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Provision (benefit) for income taxes Income Tax Expense Benefit Net income (loss) Net Income Loss Net income (loss) per share attributable to common stockholders, basic Earnings Per Share Basic Weighted-average number of shares outstanding, basic Weighted Average Number Of Shares Outstanding Basic Net income (loss) per share attributable to common stockholders, diluted Earnings Per Share Diluted Weighted-average number of shares outstanding, diluted Weighted Average Number Of Diluted Shares Outstanding Statement Of Other Comprehensive Income [Abstract] Net income (loss) Other comprehensive income (loss): Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Unrealized gain (loss) on available-for-sale investments Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Total comprehensive income (loss) Comprehensive Income Net Of Tax Stock issued during period, value,repurchase of unvested early exercised stock options. Stock issued during period, shares, vesting of early-exercised stock options. Adjustments to additional paid in capital share based compensation vesting of early exercised stock options. Temporary equity, stock issued during period, shares, new issues. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Redeemable Convertible Preferred Stock Redeemable Convertible Preferred Stock [Member] 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 Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Beginning Balance Beginning Balance, Shares Temporary Equity Shares Outstanding Beginning Balance Temporary Equity Carrying Amount Attributable To Parent Beginning Balance, Shares Shares Outstanding Issuance of Series D redeemable convertible preferred stock at$12.75 per share, net of issuance costs of $336 Temporary Equity Stock Issued During Period Value New Issues Issuance of Series D redeemable convertible preferred stock, Shares Temporary Equity Stock Issued During Period Shares New Issues Issuance of common stock in connection with equity offering, net of offering costs of $643 Stock Issued During Period Value New Issues Issuance of common stock in connection with equity offering, net of offering costs of $643, Shares Stock Issued During Period Shares New Issues 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 Repurchase of unvested early exercised stock options Stock Issued During Period Value Repurchase Of Unvested Early Exercised Stock Options Repurchase of unvested early exercised stock options, Shares Stock Repurchased During Period Shares Vesting of early-exercised stock options Adjustments To Additional Paid In Capital Share Based Compensation Vesting Of Early Exercised Stock Options Vesting of early-exercised stock options, Shares Stock Issued During Period Shares Vesting Of Early Exercised Stock Options Issuance under Employee Stock Purchase Plan Stock Issued During Period Value Employee Stock Purchase Plan Issuance under Employee Stock Purchase Plan, Shares Stock Issued During Period Shares Employee Stock Purchase Plans Stock-based compensation Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Unrealized gain (loss) on available-for-sale investments Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax Ending Balance Ending Balance, Shares Ending Balance Ending Balance, Shares Issuance of Series D redeemable convertible preferred stock, per share Shares Issued Price Per Share Issuance / offering costs Adjustments To Additional Paid In Capital Stock Issued Issuance Costs Proceeds from sales of investments. Payments for repurchase of unvested early exercised stock options. Proceeds from issuance under employee stock purchase plan. Vesting of early exercised stock options. Deferred offering costs included in accounts payable and accrued liabilities. Statement Of Cash Flows [Abstract] Cash flows from 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) provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation And Amortization Stock-based compensation Share Based Compensation Net amortization (accretion) of premium (discount) on investments Accretion Amortization Of Discounts And Premiums Investments Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Contract assets Increase Decrease In Contract With Customer Asset Accounts receivable Increase Decrease In Accounts Receivable Income tax receivable Increase Decrease In Income Taxes Receivable Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets Accounts payable Increase Decrease In Accounts Payable Deferred revenue Increase Decrease In Contract With Customer Liability Accrued and other liabilities Increase Decrease In Other Accounts Payable And Accrued Liabilities Net cash (used in) provided by operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities Net Cash Provided By Used In Investing Activities [Abstract] Purchases of investments Payments To Acquire Investments Sales of investments Proceeds From Sales Of Investments Maturities of investments Proceeds From Sale Maturity And Collections Of Investments 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 from financing activities Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from issuance of redeemable convertible preferred stock, net of offering costs Proceeds From Issuance Of Redeemable Convertible Preferred Stock Proceeds from issuance of common stock, net of offering costs Proceeds From Issuance Of Common Stock Proceeds from exercise of stock options Proceeds From Stock Options Exercised Repurchase of unvested early exercised stock options Payments For Repurchase Of Unvested Early Exercised Stock Options Proceeds from issuance under Employee Stock Purchase Plan Proceeds From Issuance Under Employee Stock Purchase Plan Payments of deferred offering costs Payments Of Debt Issuance Costs Net cash provided by financing activities Net Cash Provided By Used In Financing Activities 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 Cash, cash equivalents and restricted cash at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations Cash, cash equivalents and restricted cash at end of period Supplemental disclosures of non-cash investing and financing activities: Noncash Investing And Financing Items [Abstract] Additions to property and equipment included in accounts payable and accrued liabilities Capital Expenditures Incurred But Not Yet Paid Vesting of early exercised stock options Vesting Of Early Exercised Stock Options Deferred offering costs included in accounts payable and accrued liabilities Deferred Offering Costs Included In Accounts Payable And Accrued Liabilities Reconciliation of cash, cash equivalents, and restricted cash as shown in the statements of cash flows: Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations [Abstract] Cash and cash equivalents Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Restricted cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Disposal Group Including Discontinued Operations Total cash, cash equivalents and restricted cash Organization Consolidation And Presentation Of Financial Statements [Abstract] Organization Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Text Block] Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Collaboration Agreements Collaborative Arrangement Disclosure [Text Block] Balance Sheet Related Disclosures [Abstract] Condensed Consolidated Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Measurement Inputs Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Common Stock Stockholders Equity Note Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Stock-Based Compensation Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Compensation And Retirement Disclosure [Abstract] Defined Contribution Plan Defined Contribution Plan [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Earnings Per Share [Abstract] Net Income (Loss) Per Share Earnings Per Share [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Principles of Consolidation Consolidation Policy [Text Block] Reverse Stock Split Stockholders Equity Policy [Text Block] Use of Estimates Use Of Estimates Concentration of Credit Risk Concentration Risk Credit Risk Other risks and uncertainties policy. Other Risks and Uncertainties Other Risks And Uncertainties Policy Policy [Text Block] Revenue Recognition Revenue Recognition Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Summary of Property and Equipment Property Plant And Equipment [Text Block] Schedule of accrued and other liabilities. Summary of Accrued and Other Current Liabilities Schedule Of Accrued And Other Liabilities Table [Text Block] Summary of Financial Assets Fair Value Measurement on Recurring Basis Fair Value Assets Measured On Recurring Basis [Text Block] Schedule of Future Minimum Lease Payments Schedule Of Future Minimum Rental Payments For Operating Leases Table [Text Block] Schedule of common stock shares reserved for future issuance. Schedule of Common Stock Shares Reserved for Future Issuance Schedule Of Common Stock Shares Reserved For Future Issuance Table [Text Block] Schedule of Activity under 2020 Plan and 2012 Plan Schedule Of Share Based Compensation Stock Options Activity Table [Text Block] Summary of Stock-Based Compensation Expense Related to Stock Options and ESPP Included in Statements of Operations Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Schedule of Computation of Basic and Diluted Net Income (Loss) per Share Attributable to Common Stockholders Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Income (Loss) per Share of Common Stock Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Underwriting discounts and commissions. Stock offering expense. Organization, consolidation and presentation of financial statements. Organization, consolidation and presentation of financial statements. Organization Consolidation And Presentation Of Financial Statements [Table] Organization Consolidation And Presentation Of Financial Statements [Table] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] IPO I P O [Member] Underwriters Over Allotment Option [Member] Follow-on offering. Follow-on Offering Follow On Offering [Member] Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization Consolidation And Presentation Of Financial Statements [Line Items] Number of shares issued Stock issued, price per share Preferred stock converted into common stock Stock Issued During Period Shares Conversion Of Convertible Securities Net proceeds from offering Proceeds From Issuance Initial Public Offering Underwriting discounts and commissions Underwriting Discounts And Commissions Stock offering expenses Stock Offering Expense Net proceeds from offering Cash, cash equivalents and investments. Negative net cash flows from operating activities cash, cash equivalents and investments Cash Cash Equivalents And Investments 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 2018-13 Accounting Standards Update201813 [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Reverse stock split, conversion ratio Stockholders Equity Note Stock Split Conversion Ratio1 Reverse stock split, description Stockholders Equity Reverse Stock Split Change in accounting principle, accounting standards update, adopted [true false] Change In Accounting Principle Accounting Standards Update Adopted Change in accounting principle, accounting standards update, adoption date Change In Accounting Principle Accounting Standards Update Adoption Date Change in accounting principle, accounting standards update, immaterial effect [true false] Change In Accounting Principle Accounting Standards Update Immaterial Effect Upfront payment. Upfront payment of additional fees. Additional payments received. Upfront payment of additional fees receivable. Development milestone payments receivable. Sales milestone payments receivable. Additional fees receivable related to target licensing reservation and selection and research term extensions Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Collaborative Arrangement and Arrangement Other than Collaborative Type Of Arrangement [Axis] Collaborative Arrangement and Arrangement Other than Collaborative Arrangements And Nonarrangement Transactions [Member] Gilead agreement. Gilead Agreement Gilead Agreement [Member] Statistical Measurement Range [Axis] Statistical Measurement Range [Member] Maximum Maximum [Member] Minimum Minimum [Member] Sanofi agreement. Sanofi Agreement Sanofi Agreement [Member] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Upfront payment Upfront Payment Upfront payment of additional fees Upfront Payment Of Additional Fees Additional payments received Additional Payments Received Total additional payments receivable Upfront Payment Of Additional Fees Receivable Development milestone payments, receivable Development Milestone Payments Receivable Sales milestone payments, receivable Sales Milestone Payments Receivable Additional fees receivable related to target licensing, reservation and selection and research term extensions Additional Fees Receivable Related To Target Licensing Reservation And Selection And Research Term Extensions Variable consideration included in transaction price. Collaboration agreement contract term. Variable consideration included in transaction price Variable Consideration Included In Transaction Price Collaboration agreement contract term Collaboration Agreement Contract Term Collaboration revenue recognized from opening contract liability Contract With Customer Liability Revenue Recognized Performance obligation satisfied Contract With Customer Performance Obligation Satisfied In Previous Period Recorded deferred revenue Contract With Customer Liability Payment received to exercise option to expand number of targets. Payment received to exercise option to expand number of targets Payment Received To Exercise Option To Expand Number Of Targets Additional payment received to exercise option to expand number of targets. Milestone payments additional fees receivable. Regulatory milestone payments receivable. Additional fees receivable related to target licensing and reservation. Additional payment received to exercise option to expand number of targets Additional Payment Received To Exercise Option To Expand Number Of Targets Milestone payments additional fees, total Milestone Payments Additional Fees Receivable Regulatory milestone payments, receivable Regulatory Milestone Payments Receivable Additional fees receivable related to target licensing and reservation Additional Fees Receivable Related To Target Licensing And Reservation Collaborative agreement expected transaction price. Collaborative agreement additional transaction price. Contractual initial research period. Collaborative agreement expected transaction price Collaborative Agreement Expected Transaction Price Collaborative agreement additional transaction price Collaborative Agreement Additional Transaction Price Contractual initial research period Contractual Initial Research Period Collaboration revenue Revenue From Contract With Customer Excluding Assessed Tax Revenue, product and service [Extensible List] Type Of Revenue Extensible List Property Plant And Equipment [Abstract] Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Long-Lived Tangible Asset Property Plant And Equipment By Type [Axis] Long-Lived Tangible Asset Property Plant And Equipment Type [Domain] Laboratory equipment. Laboratory Equipment Laboratory Equipment [Member] Leasehold Improvements Leasehold Improvements [Member] Computer Equipment Computer Equipment [Member] Furniture and Fixtures Furniture And Fixtures [Member] Software. Software Software [Member] Software in progress. Software in Progress Software In Progress [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Total property and equipment, gross Property Plant And Equipment Gross Less: Accumulated depreciation and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Total property and equipment, net Depreciation and amortization expense Accrued contract research and lab supplies. Accrued Liabilities And Other Liabilities [Abstract] Accrued compensation Employee Related Liabilities Current Accrued contract research and lab supplies Accrued Contract Research And Lab Supplies Accrued professional services Accrued Professional Fees Current Accrued taxes Taxes Payable Current Other Other Liabilities Current Total Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Measurement Frequency Fair Value By Measurement Frequency [Axis] Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value Measurements, Recurring Fair Value Measurements Recurring [Member] 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] Level 1 Fair Value Inputs Level1 [Member] Level 2 Fair Value Inputs Level2 [Member] Debt Security Category Information By Category Of Debt Security [Axis] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments Other Than Temporary Impairment Credit Losses Recognized In Earnings Categories Of Investments [Domain] Available for sales securities noncurrent. Long-term Investments Available For Sales Securities Noncurrent [Member] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Municipal Securities Municipal Notes [Member] Municipal Securities Municipal Bonds [Member] Included in Cash and Cash Equivalents Cash And Cash Equivalents [Member] Included in Short-term Investments Short Term Investments [Member] Long-term investments. Included in Long-term Investments Long Term Investments [Member] Asset Class Fair Value By Asset Class [Axis] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Money Market Funds Money Market Funds [Member] U.S. Treasury Securities U S Treasury Securities [Member] Corporate Debt Securities Corporate Debt Securities [Member] U.S. Government Agency Securities U S Government Agencies Debt Securities [Member] Corporate Commercial Paper Commercial Paper [Member] 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] Amortized cost Available For Sale Debt Securities Amortized Cost Basis Unrealized gain Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax Unrealized loss Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax Estimated fair value Available For Sale Securities Debt Securities Debt securities unrealized loss position, more than12 months number of positions Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions Other-than-temporary impairment losses recognized Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings Lessee Lease Description [Table] Lessee Lease Description [Table] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Letter of Credit Letter Of Credit [Member] Lessee Lease Description [Line Items] Lessee Lease Description [Line Items] Outstanding, pending or threatened litigation Litigation Settlement Expense Operating lease, lease term Lessee Operating Lease Term Of Contract Lease expiration date Lease Expiration Date1 Operating lease, description Lessee Operating Lease Description Security deposits Security Deposit Letter of credit collateralized by a restricted deposit Restricted Cash Equivalents Noncurrent Rent expense Operating Lease Expense 2021 (remaining 6 months) Operating Leases Future Minimum Payments Remainder Of Fiscal Year 2022 Operating Leases Future Minimum Payments Due In Two Years 2023 Operating Leases Future Minimum Payments Due In Three Years 2024 Operating Leases Future Minimum Payments Due In Four Years 2025 Operating Leases Future Minimum Payments Due In Five Years Total minimum lease payments Operating Leases Future Minimum Payments Due Common stock, shares authorized to issue Common stock, voting rights Common Stock Voting Rights Common stock, dividends declared Common Stock Dividends Per Share Declared Common stock. Common Stock [Abstract] Schedule Of Stock By Class [Table] Schedule Of Stock By Class [Table] Shares Available for Issuance Under Employee Stock Purchase Plan Employee Stock [Member] Award Type Award Type [Axis] Award Type Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Issuance of Options Under Stock Option Plan Employee Stock Option [Member] Shares Available for Future Stock Option Grants Stock Compensation Plan [Member] Class Of Stock [Line Items] Class Of Stock [Line Items] Total common stock reserved for future issuance Common Stock Capital Shares Reserved For Future Issuance Share based compensation arrangement by share based payment award combined voting power of common stock holding percentage. Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] 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] Incentive stock option. Incentive Stock Option Incentive Stock Option [Member] Non-statutory stock option and options granted to consultants. Non-statutory Stock Options and Options Granted to Consultants Non Statutory Stock Option And Options Granted To Consultants [Member] 2012 Equity incentive plan. 2012 Equity Incentive Plan Two Thousand Twelve Equity Incentive Plan [Member] 2020 Employee stock purchase plan. 2020 Employee Stock Purchase Plan Two Thousand Twenty Employee Stock Purchase Plan [Member] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Vesting period of options granted Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Percentage of total combined voting power of common stock Share Based Compensation Arrangement By Share Based Payment Award Combined Voting Power Of Common Stock Holding Percentage Percentage of fair value on grant date Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent Award expiration period Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period Common stock shares reserved for future issuance 2020 Plan and 2012 Plan. 2020 Plan and 2012 Plan Two Thousand Twenty Plan And Two Thousand Twelve Plan [Member] Number of options outstanding, Beginning balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number Number of options outstanding, Options granted Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross Number of options outstanding, Options exercised Number of options outstanding, Options forfeited Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period Number of options outstanding, Ending Balance Number of options outstanding, Options vested and expected to vest as of May 31, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number Number of options outstanding, Options exercisable as of May 31, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number Weighted-average exercise price, Beginning balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Weighted-average exercise price, Options granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price Weighted-average exercise price, Options exercised Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price Weighted-average exercise price, Options forfeited Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price Weighted-average exercise price, Ending balance Weighted-average exercise price, Options vested and expected to vest as of May 31, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price Weighted-average exercise price, Options exercisable as of May 31, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price Weighted-average contractual life (in years) Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 Weighted-average contractual life (in years) Options vested and expected to vest as of May 31, 2021 Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 Weighted-average contractual life (in years) Options exercisable as of May 31, 2021 Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 Aggregate intrinsic value Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value Aggregate intrinsic value, Options exercised Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value Aggregate intrinsic value, Options vested and expected to vest as of May 31, 2021 Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value Aggregate intrinsic value, Options exercisable as of May 31, 2021 Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 Share based compensation arrangement by share based payment award options shares subject to repurchase. Share based compensation arrangements by share based payment award options exercise value of shares subject to repurchase. Shares subject to repurchase Share Based Compensation Arrangement By Share Based Payment Award Options Shares Subject To Repurchase Exercise value of shares subject to repurchase Share Based Compensation Arrangements By Share Based Payment Award Options Exercise Value Of Shares Subject To Repurchase Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Stock options and employee stock purchase plan. Stock Options and ESPP Stock Options And Employee Stock Purchase Plan [Member] 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] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Total stock-based compensation Allocated Share Based Compensation Expense Total compensation cost related to stock-based awards yet to recognize Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Total compensation cost related to stock-based awards, recognition period Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 Contribution expense Defined Contribution Plan Employer Discretionary Contribution Amount Percentage of net operating loss carryover and carryback offset of taxable income CARES Act. Net operating loss carryback period CARES Act. Net operating loss carryback refund claim CARES act. Income taxes refund received on first refund claim CARES act. Income interest received CARES Act. CARES act of 2020, percentage of net operating loss carryover and carryback offset of taxable income Percentage Of Net Operating Loss Carryover And Carryback Offset Of Taxable Income C A R E S Act CARES act of 2020, net operating loss carryback period Net Operating Loss Carryback Period C A R E S Act CARES act of 2020, net operating loss carryback refund claim Net Operating Loss Carryback Refund Claim C A R E S Act CARES act of 2020, cash received for first refund claim Income Taxes Refund Received On First Refund Claim C A R E S Act CARES act of 2020, interest income Income Interest Received C A R E S Act Income tax receivable Income Taxes Receivable Interest accrued Income Tax Examination Interest Accrued Earnings per share. Earnings per share. Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Line Items] Earnings Per Share [Line Items] Preferred stock noncumulative dividends rate percentage Preferred Stock Dividend Rate Percentage Dividends on preferred stock declared Dividends Preferred Stock Dividends on common stock declared Dividends Common Stock Numerator: Net Income Loss [Abstract] Less: noncumulative dividend to preferred stockholders Preferred Stock Dividends Income Statement Impact Net income (loss) attributable to common stockholders, basic and diluted Net Income Loss Available To Common Stockholders Basic Denominator: Weighted Average Number Of Shares Outstanding [Abstract] Weighted-average dilutive effect of stock options Incremental Common Shares Attributable To Share Based Payment Arrangements Weighted-average number of shares outstanding, diluted Revision of Prior Period Restatement [Axis] Revision of Prior Period Restatement [Domain] Previously Reported Scenario Previously Reported [Member] Diluted weighted-average number of shares outstanding Basic net income per share Diluted net income per share 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] Options to Purchase Common Stock Option early exercised subject to vesting. Options Early Exercised Subject to Vesting Option Early Exercised Subject To Vesting [Member] Shares Expected to be Purchased Under Employee Stock Purchase Plan Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Anti-dilutive securities excluded from computation of diluted net loss per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Area of office space leased. Lease commencement date. Operating lease rent payable per month. Percentage of increase of annual rent. Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Events Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Area of office space leased Area Of Office Space Leased Lease commencement date Lease Commencement Date Rent payable per month Operating Lease Rent Payable Per Month Percentage of increase of rent per year Percentage Of Increase Of Annual Rent