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Fair value of financial instruments and investments - Available-for-sale securities (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]    
Securities in an unrealized loss position less than 12 months - Unrealized losses $ (76) $ (12)
Securities in an unrealized loss position less than 12 months - Fair Value 89,360 44,446
Securities in an unrealized loss position greater than 12 months - Unrealized losses   (2)
Securities in an unrealized loss position greater than 12 months - Fair Value   1,648
Total - Unrealized losses (76) (14)
Total - Fair Value 89,360 46,094
Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Securities in an unrealized loss position less than 12 months - Unrealized losses (1) (12)
Securities in an unrealized loss position less than 12 months - Fair Value 29,810 44,446
Total - Unrealized losses (1) (12)
Total - Fair Value 29,810 44,446
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Securities in an unrealized loss position less than 12 months - Unrealized losses (75)  
Securities in an unrealized loss position less than 12 months - Fair Value 59,550  
Securities in an unrealized loss position greater than 12 months - Unrealized losses   (2)
Securities in an unrealized loss position greater than 12 months - Fair Value   1,648
Total - Unrealized losses (75) (2)
Total - Fair Value $ 59,550 $ 1,648