v3.26.1
Stockholders' Equity - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 19, 2024
Oct. 13, 2022
Jul. 14, 2006
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
May 14, 2026
Nov. 16, 2025
Aug. 01, 2024
Oct. 12, 2022
Jan. 05, 2022
Temporary Equity [Line Items]                            
All classes of stock, shares authorized (in shares)       1,000,000,000   1,000,000,000                
Common stock, shares authorized (in shares)       900,000,000   900,000,000   900,000,000            
Common stock, par value per share (in dollars per share)       $ 0.00001   $ 0.00001   $ 0.00001     $ 0.00001 $ 0.00001    
Preferred stock, shares authorized (in shares)       100,000,000   100,000,000   100,000,000            
Preferred stock, par value (in dollars per share)       $ 0.00001   $ 0.00001   $ 0.00001            
Preferred stock, shares issued (in shares)       1   1   1            
Preferred stock, shares outstanding (in shares)       1   1   1            
Common shares issued (in shares)       71,412,072   71,412,072   74,638,413            
Common shares outstanding (in shares)       71,412,072   71,412,072   74,638,413            
Exchangeable stock, shares outstanding (in shares)       550,000   550,000   553,184            
Shares granted with respect to maximum fixed amount equal, percentage     20.00%                      
Options granted under original plan exercisable period           10 years                
Number of shares available for grant (in shares)       5,190,276   5,190,276   5,023,809            
Proceeds from stock options exercised           $ 11,605,000                
Unamortized compensation expense related to unvested options           $ 26,728,000                
Remaining unamortized compensation expense, weighted-average period           1 year 9 months 25 days                
Inducement Plan                            
Temporary Equity [Line Items]                            
Number of shares available for grant (in shares) 1,450,000     622,500   622,500   390,000            
Number of common shares reserved for issuance (in shares)                           750,000
Number of additional shares authorized (in shares) 700,000                          
Restricted Share Units (RSUs)                            
Temporary Equity [Line Items]                            
Nonvested award, cost not yet recognized, amount       $ 25,108,000   $ 25,108,000                
Nonvested award, cost not yet recognized, period for recognition           1 year 11 months 1 day                
Compensation charge       5,167,000 $ 2,346,000 $ 8,863,000 $ 4,626,000              
Performance Shares                            
Temporary Equity [Line Items]                            
Nonvested award, cost not yet recognized, amount       9,473,000   $ 9,473,000                
Nonvested award, cost not yet recognized, period for recognition           2 years 7 months 9 days                
Repurchase Program 2024                            
Temporary Equity [Line Items]                            
Share repurchase program, authorized amount                       $ 60,000,000    
Treasury stock repurchased (in shares)               1,856,907 2,545,402          
Treasury stock repurchased value               $ 29,997,000 $ 30,000,000          
Commission expense on share repurchases               37,000 51,000          
Excise tax               $ 0 $ 152,000          
Retirement of treasury stock ( in shares)               1,856,907 2,545,402          
Repurchase Program, 2025                            
Temporary Equity [Line Items]                            
Share repurchase program, authorized amount                     $ 125,000,000      
Treasury stock repurchased (in shares)           3,766,336   431,217            
Treasury stock repurchased value           $ 91,069,000   $ 11,188,000            
Commission expense on share repurchases           $ 75,000   9,000            
Excise tax               $ 0            
Retirement of treasury stock ( in shares)           3,766,336   431,217            
Treasury stock payable               $ 464,000            
Repurchase Program, 2026                            
Temporary Equity [Line Items]                            
Share repurchase program, authorized amount                   $ 125,000,000.0        
Treasury stock repurchased (in shares)           2,008,243                
Treasury stock repurchased value           $ 51,908,000                
Commission expense on share repurchases           $ 42,000                
Retirement of treasury stock ( in shares)           2,008,243                
Treasury stock payable       $ 1,996,000   $ 1,996,000                
Repurchase Program, 2025 And 2026                            
Temporary Equity [Line Items]                            
Excise tax           $ 797,000                
Common stock                            
Temporary Equity [Line Items]                            
Redomicile transaction, number of shares issued (in shares)   60,274,854                        
Exchangeable shares                            
Temporary Equity [Line Items]                            
Temporary equity, stock issued during period, shares, new issues (in shares)   1,424,533                        
Zymeworks BC Inc                            
Temporary Equity [Line Items]                            
Common shares issued (in shares)                         61,699,387  
Common shares outstanding (in shares)                         61,699,387