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Fair value of financial instruments and marketable securities - Marketable Securities, Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 306,198		$ 259,778
Gross Unrealized, Gain	67		340
Gross Unrealized, Loss	(186)		(14)
Fair Value	306,079		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	0	$ 0
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	132,080		117,044
Gross Unrealized, Gain	26		128
Gross Unrealized, Loss	(121)		(12)
Fair Value	131,985		117,160
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost			1,650
Gross Unrealized, Loss			(2)
Fair Value			1,648
Government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	174,118		141,084
Gross Unrealized, Gain	41		212
Gross Unrealized, Loss	(65)
Fair Value	$ 174,094		$ 141,296

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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