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Fair value of financial instruments and investments - Marketable Securities, Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 330,684	$ 259,778
Gross Unrealized, Gain	345	340
Gross Unrealized, Loss	(76)	(14)
Fair Value	330,953	260,104
Write downs of available for sale debt securities	0	0
Increase in allowance for credit losses	0	0
Realized gain (loss) from sale of marketable securities	3,400	(300)
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	44,780	117,044
Gross Unrealized, Gain	0	128
Gross Unrealized, Loss	(1)	(12)
Fair Value	44,779	117,160
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	89,320	1,650
Gross Unrealized, Gain	76	0
Gross Unrealized, Loss	(75)	(2)
Fair Value	89,321	1,648
Government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	196,584	141,084
Gross Unrealized, Gain	269	212
Gross Unrealized, Loss	0	0
Fair Value	$ 196,853	$ 141,296

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