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Revenue - Transaction price allocated to performance obligations (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Oct. 31, 2022
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of performance obligations [line items]          
Research and license revenue     $ 19,391 $ 5,350 $ 3,747
Contract Asset   $ 3,309      
Deferred revenue     35,000    
Seagen          
Disclosure of performance obligations [line items]          
Transaction Price   21,500      
Research and license revenue   17,901      
Ifrs License [Member] | Seagen          
Disclosure of performance obligations [line items]          
Transaction Price   50,000      
Research and license revenue   15,165 15,200    
Manufacturing Technology Transfer Activities [Member] | Seagen          
Disclosure of performance obligations [line items]          
Transaction Price   2,167      
Research and license revenue   2,073 2,100    
Initial Supply [Member]          
Disclosure of performance obligations [line items]          
Contract Asset   3,309      
Initial Supply [Member] | Seagen          
Disclosure of performance obligations [line items]          
Transaction Price   3,583      
Contract Asset     3,300    
Research Activities [Member] | Seagen          
Disclosure of performance obligations [line items]          
Transaction Price   750      
Research and license revenue   663 700    
Buy-up Fee [Member] | Seagen          
Disclosure of performance obligations [line items]          
Transaction Price   $ 35,000 35,000    
Non-refundable upfront payment received $ 50,000        
Deferred revenue     $ 35,000