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Stock award plan - Share-based compensation expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Stock option plan    
Share-based compensation expense $ 18,060 $ 18,378
Unrecognized compensation cost $ 170,300  
Weighted average remaining service period for recognition of unrecognized compensation cost 2 years 10 months 24 days  
Research and development    
Stock option plan    
Share-based compensation expense $ 8,663 8,967
Selling, general and administrative    
Stock option plan    
Share-based compensation expense $ 9,397 $ 9,411