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Fair value of financial instruments and marketable securities - Marketable Securities, Balance Sheet Disclosures (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]    
Marketable securities, Less Than 12 Months $ 458,098 $ 260,104
Commercial paper    
Debt Securities, Available-for-Sale [Line Items]    
Marketable securities, Less Than 12 Months 119,419 117,160
Corporate debt securities    
Debt Securities, Available-for-Sale [Line Items]    
Marketable securities, Less Than 12 Months 44,642 1,648
Government obligations    
Debt Securities, Available-for-Sale [Line Items]    
Marketable securities, Less Than 12 Months $ 294,037 $ 141,296