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[Member] Zymeworks Zanidatamab Inc. 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File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Investments, fair value Debt Securities And Equity Securities Without Readily Determinable Fair Value Debt Securities And Equity Securities Without Readily Determinable Fair Value Schedule of Stock Options Granted Share-Based Payment Arrangement, Option, Activity [Table Text Block] Weighted- Average Exercise Price ($) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Debt securities, unrealized gain (loss) Debt Securities, Available-for-Sale, Unrealized Gain (Loss), Maturity, Allocated and Single Maturity Date, Year One Debt Securities, Available-for-Sale, Unrealized Gain (Loss), Maturity, Allocated and Single Maturity Date, Year One Interest expense related to sale of future royalties Interest Expense Related to Sale of Future Royalties Interest Expense Related to Sale of Future Royalties Operating lease liabilities Increase (Decrease) in Operating Lease Liabilities Increase decrease in operating lease liabilities. Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Currency [Axis] Currency [Axis] Product and Service [Domain] Product and Service [Domain] Net cash paid during the period for income taxes Income Tax Paid, after Refund Received ZW251 ZW251 [Member] ZW251 Entity Interactive Data Current Entity Interactive Data Current Deferred tax liability Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Entity Small Business Entity Small Business Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Document Type Document Type 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] Fair Value as of Grant Date Award Grant Date Fair Value Deferred Revenue Arrangement [Line Items] Deferred Revenue Arrangement [Line Items] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Adjustment for dilutive effect of liability classified stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements, Liability Classified Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements, Liability Classified Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Deferred revenue Contract with Customer, Liability, Noncurrent Interest expense related to sale of future royalties Interest Expense And Amortization Related to Sale of Future Royalties Interest Expense And Amortization Related to Sale of Future Royalties Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Payments for transaction costs related to sale of future royalties Payments for Transaction Costs Related to Sale of Future Royalties Payments for Transaction Costs Related to Sale of Future Royalties Schedule of PSU Activity Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] (Loss) income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Amortization right of use asset Finance Lease, Right-of-Use Asset, Amortization ZW171 ZW171 [Member] ZW171 Counterparty Name [Axis] Counterparty Name [Axis] Liabilities and stockholders’ equity Liabilities and Equity [Abstract] Other Commitments [Table] Other Commitments [Table] Long-term marketable securities: Debt Securities, Available-for-Sale, Amortized Cost [Abstract] Schedule of Balance Sheet Classification of Lease Liabilities Schedule Of Lease Liabilities Classification [Table Text Block] Schedule of lease liabilities classification. Exchangeable shares Exchangeable Shares [Member] Exchangeable Shares Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Level 3 Fair Value, Inputs, Level 3 [Member] Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Expected average life of options Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Treasury stock repurchased (in shares) Total number of shares purchased (in shares) Treasury Stock, Shares, Acquired PEO Name PEO Name Geographical [Axis] Geographical [Axis] BeOne: BeOne Medicines Ltd. [Member] BeOne Medicines Ltd. Debt securities, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, After Year One Through Three Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, After Year One Through Three Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Contractual maturity of one to three years: Debt Securities, Available-For-Sale Fiscal Year Maturity, Year One Through Three [Abstract] Debt Securities, Available-For-Sale Fiscal Year Maturity, Year One Through Three Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Schedule of Revenue Recognized from Strategic Partnerships Collaborative Arrangement and Arrangement Other than Collaborative [Table Text Block] Other Commitments [Line Items] Other Commitments [Line Items] Inducement Plan Inducement Plan [Member] Inducement Plan Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Treasury stock repurchased value Approximate value of shares purchased Treasury Stock, Value, Acquired, Cost Method Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Jazz: Jazz [Member] Jazz Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Extension period (in years) Business Combination, Contingent Consideration, Extension Period Business Combination, Contingent Consideration, Extension Period Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Debt Instrument [Axis] Debt Instrument [Axis] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Adjustment for change in fair value of liability classified stock options Fair Value, Option, Adjustment For Change In Fair Value Of Liability Classified Stock Options Fair Value, Option, Adjustment For Change In Fair Value Of Liability Classified Stock Options Salaries and benefits and stock based compensation Labor and Related Expense Operating lease expense Lease, Cost Royalty Revenue Monetization Royalty Revenue Monetization [Text Block] Royalty Revenue Monetization Issuance of common shares upon exercise of pre-funded warrants (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Customer [Domain] Customer [Domain] Leases Lessee, Operating Leases [Text Block] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Net loss per common share – basic (in dollars per share) Earnings Per Share, Basic Purchases of common stock for retirement Payments for Repurchase of Common Stock Deferred revenue Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Award Type [Axis] Award Type [Axis] Deferred financing fees Payments of Financing Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Accumulated deficit Retained Earnings (Accumulated Deficit) Canadian Dollar Under the New Option Stock Plan CAD Dollars Under The New Stock Option Plan [Member] CAD dollars under the new stock option plan. Product and Service [Axis] Product and Service [Axis] All Currencies [Domain] All Currencies [Domain] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Number of reporting units Goodwill, Reporting Unit, Number Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] 2 to 3 years Lessee, Operating Lease, Liability, to be Paid, Rolling Year Three Amount Due If Paid On Or Before December 31, 2033 Amount Due If Paid On Or Before December 31, 2033 [Member] Amount Due If Paid On Or Before December 31, 2033 Common stock Common Stock [Member] Operating lease expense Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Other comprehensive (loss) income: Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosure [Abstract] Concentration risk, percentage Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Royalty payments to Royalty Pharma Royalty Payments Royalty Payments Equity Awards Adjustments Equity Awards Adjustments [Member] Reverse termination fee Business Combination, Reverse Termination Fee, Amount Business Combination, Reverse Termination Fee, Amount Development support payments Research Support Payments And Other Service [Member] Research Support Payments And Other Service Unamortized compensation expense related to unvested options Share Based Compensation By Share Based Payment Award Unamortized Compensation Expense Share based compensation by share based payment award unamortized compensation expense. Research, Collaboration and Licensing Agreements Collaborative Arrangement Disclosure [Text Block] Total liabilities and stockholders’ equity Liabilities and Equity Variable lease expense Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Royalty percentage retained Royalty Percentage Retained Royalty Percentage Retained Tabular List, Table Tabular List [Table Text Block] Unrealized Gain Debt Securities, Available-for-Sale, Unrealized Gain (Loss), Maturity, Allocated and Single Maturity Date, After Year One Through Four Debt Securities, Available-for-Sale, Unrealized Gain (Loss), Maturity, Allocated and Single Maturity Date, After Year One Through Four Acquisition of intangible assets Payments to Acquire Intangible Assets Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate ZW220 ZW220 [Member] ZW220 Total other (expense) income, net Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Aggregate intrinsic value outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value General and administrative General and Administrative Expense Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Issuance of common shares upon exercise of pre-funded warrants Stock Issued During Period, Value, Conversion of Convertible Securities Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Debt securities, unrealized gain (loss) Debt Securities, Available-for-Sale, Unrealized Gain (Loss), Maturity, Allocated and Single Maturity Date, After Year One Through Three Debt Securities, Available-for-Sale, Unrealized Gain (Loss), Maturity, Allocated and Single Maturity Date, After Year One Through Three Preferred shares, $0.00001 par value; 100,000,000 authorized shares of preferred stock, out of which, one share of preferred stock is a share of Special Voting Preferred Stock and outstanding as of June 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Exchangeable shares, no par value, 550,000 and 553,184 issued and outstanding shares at June 30, 2026 and December 31, 2025, respectively Exchangeable Shares, Value, Issued Exchangeable Shares, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Senior Secured Notes Senior Secured Notes [Member] Senior Secured Notes Share Repurchase Program [Axis] Share Repurchase Program [Axis] Class of Stock [Domain] Class of Stock [Domain] U.S Dollar Under the New Option Stock Plan U S Dollars Under The New Stock Option Plan [Member] U S Dollars Under The New Stock Option Plan Credit Concentration Risk Credit Concentration Risk [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Short-term marketable securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Assets, Fair Value Disclosure, Total Assets, Fair Value Disclosure Schedule of Repurchase Agreements Schedule of Repurchase Agreements [Table Text Block] Canada, Dollars Canada, Dollars Name Measure Name Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Goodwill impairment loss Goodwill, Impairment Loss Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Within 1 year Lessee, Operating Lease, Liability, to be Paid, Next Rolling 12 Months Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Zymeworks BC Inc Zymeworks BC Inc [Member] Zymeworks BC Inc Proceeds from sale of future royalties Proceeds from sale of future royalties Proceeds From Sale of Future Royalties Proceeds From Sale of Future Royalties Outstanding, at beginning of period (in shares) Outstanding, at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Remaining unamortized compensation expense, weighted-average period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Converted share price (in dollar per share) Business Combination, Price Per Share Current assets: Assets, Current [Abstract] Operating leases Operating Lease, Weighted Average Remaining Lease Term Daiichi Sankyo, Co., Ltd. (“Daiichi Sankyo”): Daiichi Sankyo, Co., Ltd [Member] Daiichi sankyo, co., ltd. Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Leased assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Vested and settled (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Income tax recovery (expense) Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Temporary Equity, by Class of Stock [Table] Temporary Equity, by Class of Stock [Table] Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Award Timing Method Award Timing Method [Text Block] Net change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Other research and development expense Other Research and Development Expense Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Research and development Research and Development Expense (Excluding Acquired in Process Cost) Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Net (loss) income Net loss Net loss Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Expense for other preclinical and research programs Other Preclinical And Research Programs [Member] Other Preclinical And Research Programs Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from stock options exercised Proceeds from Stock Options Exercised Non-Recourse Secured Term Loan Non-Recourse Secured Term Loan [Member] Non-Recourse Secured Term Loan Issuance costs Issuance costs related to sale of future royalties Sale of Future Royalties, Issuance Costs Sale of Future Royalties, Issuance Costs Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Unrealized foreign exchange (gain) loss Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Revenue Revenues [Abstract] Retirement of treasury stock ( in shares) Treasury Stock, Shares, Retired Cancelled, expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]