v3.26.1
Significant agreements - Ionis Share Purchase Agreement (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jul. 09, 2021
Dec. 31, 2024
Dec. 31, 2023
Jul. 31, 2025
Jun. 30, 2025
Significant agreements.          
Aggregate purchase price   $ 544,127 $ 249,345    
Ionis          
Significant agreements.          
Transaction price $ 38,000 $ 37,800   $ 39,800 $ 37,800
Ionis | Ionis Share Purchase Agreement          
Significant agreements.          
Shares issued (in shares) 282,485        
Purchase price per share $ 38.94        
Aggregate purchase price $ 11,000        
Fair value of shares held 7,600        
Transaction price $ 3,400        
Ionis | Ionis Share Purchase Agreement | American Depositary Shares          
Significant agreements.          
Purchase price per share $ 31.11