3.22.1 html 89 174 1 false 33 0 false 4 false false R1.htm 0001001 - Document - Cover Sheet http://werewolftx.com/role/Cover Cover Cover 1 false false R2.htm 1001002 - Statement - Condensed Consolidated Balance Sheets (unaudited) Sheet http://werewolftx.com/role/CondensedConsolidatedBalanceSheetsunaudited Condensed Consolidated Balance Sheets (unaudited) Statements 2 false false R3.htm 1002003 - Statement - Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) Sheet http://werewolftx.com/role/CondensedConsolidatedBalanceSheetsunauditedParenthetical Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) Statements 3 false false R4.htm 1003004 - Statement - Condensed Consolidated Statements of Operations (unaudited) Sheet http://werewolftx.com/role/CondensedConsolidatedStatementsofOperationsunaudited Condensed Consolidated Statements of Operations (unaudited) Statements 4 false false R5.htm 1004005 - Statement - Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders??? (Deficit) Equity (unaudited) Sheet http://werewolftx.com/role/CondensedConsolidatedStatementsofRedeemableConvertiblePreferredStockandStockholdersDeficitEquityunaudited Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders??? (Deficit) Equity (unaudited) Statements 5 false false R6.htm 1005006 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited) Sheet http://werewolftx.com/role/CondensedConsolidatedStatementsofCashFlowsunaudited Condensed Consolidated Statements of Cash Flows (unaudited) Statements 6 false false R7.htm 2101101 - Disclosure - Description of Business, Organization, and Liquidity Sheet http://werewolftx.com/role/DescriptionofBusinessOrganizationandLiquidity Description of Business, Organization, and Liquidity Notes 7 false false R8.htm 2103102 - Disclosure - Summary of Significant Accounting Policies Sheet http://werewolftx.com/role/SummaryofSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 8 false false R9.htm 2105103 - Disclosure - Financial Instruments and Fair Value Measurements Sheet http://werewolftx.com/role/FinancialInstrumentsandFairValueMeasurements Financial Instruments and Fair Value Measurements Notes 9 false false R10.htm 2108104 - Disclosure - Restricted Cash Sheet http://werewolftx.com/role/RestrictedCash Restricted Cash Notes 10 false false R11.htm 2110105 - Disclosure - Accrued Expenses and Other Current Liabilities Sheet http://werewolftx.com/role/AccruedExpensesandOtherCurrentLiabilities Accrued Expenses and Other Current Liabilities Notes 11 false false R12.htm 2113106 - Disclosure - Common and Preferred Stock Sheet http://werewolftx.com/role/CommonandPreferredStock Common and Preferred Stock Notes 12 false false R13.htm 2116107 - Disclosure - Stock-based Compensation Sheet http://werewolftx.com/role/StockbasedCompensation Stock-based Compensation Notes 13 false false R14.htm 2123108 - Disclosure - Net (Loss) Income Attributable to Common Stockholders per Share Sheet http://werewolftx.com/role/NetLossIncomeAttributabletoCommonStockholdersperShare Net (Loss) Income Attributable to Common Stockholders per Share Notes 14 false false R15.htm 2126109 - Disclosure - Subsequent Events Sheet http://werewolftx.com/role/SubsequentEvents Subsequent Events Notes 15 false false R16.htm 2204201 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://werewolftx.com/role/SummaryofSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://werewolftx.com/role/SummaryofSignificantAccountingPolicies 16 false false R17.htm 2306301 - Disclosure - Financial Instruments and Fair Value Measurements (Tables) Sheet http://werewolftx.com/role/FinancialInstrumentsandFairValueMeasurementsTables Financial Instruments and Fair Value Measurements (Tables) Tables http://werewolftx.com/role/FinancialInstrumentsandFairValueMeasurements 17 false false R18.htm 2311302 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables) Sheet http://werewolftx.com/role/AccruedExpensesandOtherCurrentLiabilitiesTables Accrued Expenses and Other Current Liabilities (Tables) Tables http://werewolftx.com/role/AccruedExpensesandOtherCurrentLiabilities 18 false false R19.htm 2314303 - Disclosure - Common and Preferred Stock (Tables) Sheet http://werewolftx.com/role/CommonandPreferredStockTables Common and Preferred Stock (Tables) Tables http://werewolftx.com/role/CommonandPreferredStock 19 false false R20.htm 2317304 - Disclosure - Stock-based Compensation (Tables) Sheet http://werewolftx.com/role/StockbasedCompensationTables Stock-based Compensation (Tables) Tables http://werewolftx.com/role/StockbasedCompensation 20 false false R21.htm 2324305 - Disclosure - Net (Loss) Income Attributable to Common Stockholders per Share (Tables) Sheet http://werewolftx.com/role/NetLossIncomeAttributabletoCommonStockholdersperShareTables Net (Loss) Income Attributable to Common Stockholders per Share (Tables) Tables http://werewolftx.com/role/NetLossIncomeAttributabletoCommonStockholdersperShare 21 false false R22.htm 2402401 - Disclosure - Description of Business, Organization, and Liquidity (Details) Sheet http://werewolftx.com/role/DescriptionofBusinessOrganizationandLiquidityDetails Description of Business, Organization, and Liquidity (Details) Details http://werewolftx.com/role/DescriptionofBusinessOrganizationandLiquidity 22 false false R23.htm 2407402 - Disclosure - Financial Instruments and Fair Value Measurements (Details) Sheet http://werewolftx.com/role/FinancialInstrumentsandFairValueMeasurementsDetails Financial Instruments and Fair Value Measurements (Details) Details http://werewolftx.com/role/FinancialInstrumentsandFairValueMeasurementsTables 23 false false R24.htm 2409403 - Disclosure - Restricted Cash (Details) Sheet http://werewolftx.com/role/RestrictedCashDetails Restricted Cash (Details) Details http://werewolftx.com/role/RestrictedCash 24 false false R25.htm 2412404 - Disclosure - Accrued Expenses and Other Current Liabilities (Details) Sheet http://werewolftx.com/role/AccruedExpensesandOtherCurrentLiabilitiesDetails Accrued Expenses and Other Current Liabilities (Details) Details http://werewolftx.com/role/AccruedExpensesandOtherCurrentLiabilitiesTables 25 false false R26.htm 2415405 - Disclosure - Common and Preferred Stock (Details) Sheet http://werewolftx.com/role/CommonandPreferredStockDetails Common and Preferred Stock (Details) Details http://werewolftx.com/role/CommonandPreferredStockTables 26 false false R27.htm 2418406 - Disclosure - Stock-based Compensation - Narrative (Details) Sheet http://werewolftx.com/role/StockbasedCompensationNarrativeDetails Stock-based Compensation - Narrative (Details) Details 27 false false R28.htm 2419407 - Disclosure - Stock-based Compensation - Expense Recognized (Details) Sheet http://werewolftx.com/role/StockbasedCompensationExpenseRecognizedDetails Stock-based Compensation - Expense Recognized (Details) Details 28 false false R29.htm 2420408 - Disclosure - Stock-based Compensation - Restricted Stock Award Activity (Details) Sheet http://werewolftx.com/role/StockbasedCompensationRestrictedStockAwardActivityDetails Stock-based Compensation - Restricted Stock Award Activity (Details) Details 29 false false R30.htm 2421409 - Disclosure - Stock-based Compensation - Weighted Average Assumptions (Details) Sheet http://werewolftx.com/role/StockbasedCompensationWeightedAverageAssumptionsDetails Stock-based Compensation - Weighted Average Assumptions (Details) Details 30 false false R31.htm 2422410 - Disclosure - Stock-based Compensation - Stock Option Activity (Details) Sheet http://werewolftx.com/role/StockbasedCompensationStockOptionActivityDetails Stock-based Compensation - Stock Option Activity (Details) Details 31 false false R32.htm 2425411 - Disclosure - Net (Loss) Income Attributable to Common Stockholders per Share - Antidilutive Shares (Details) Sheet http://werewolftx.com/role/NetLossIncomeAttributabletoCommonStockholdersperShareAntidilutiveSharesDetails Net (Loss) Income Attributable to Common Stockholders per Share - Antidilutive Shares (Details) Details http://werewolftx.com/role/NetLossIncomeAttributabletoCommonStockholdersperShareTables 32 false false R33.htm 2427412 - Disclosure - Subsequent Events (Details) Sheet http://werewolftx.com/role/SubsequentEventsDetails Subsequent Events (Details) Details http://werewolftx.com/role/SubsequentEvents 33 false false All Reports Book All Reports howl-20220331.htm a03312022ex101.htm a03312022ex311.htm a03312022ex312.htm a03312022ex321.htm howl-20220331.xsd howl-20220331_cal.xml howl-20220331_def.xml howl-20220331_lab.xml howl-20220331_pre.xml http://fasb.org/us-gaap/2021-01-31 http://xbrl.sec.gov/dei/2021 true true