Marketable securities (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities Held

The following table summarizes the marketable securities held at December 31, 2021 and 2020 (in thousands):

	Amortized cost / cost		Unrealized gains		Unrealized losses		Fair value
December 31, 2021
U.S. government agency securities and treasuries	$	128,902	$	—	$	(509)	$	128,393
Corporate bonds	49,366		—		(59)		49,307
Commercial paper	54,065		—		—		54,065
Equity securities	4,305		—		(614)		3,691
Total	$	236,638	$	—	$	(1,182)	$	235,456
December 31, 2020 (1)
U.S. government agency securities and treasuries	$	337,521	$	151	$	(37)	$	337,635
Corporate bonds	98,585		216		(20)		98,781
Commercial paper	38,975		—		—		38,975
Equity securities	20,017		—		(14,364)		5,653
Total	$	495,098	$	367	$	(14,421)	$	481,044

(1) Prior period amounts have been retrospectively adjusted to reflect the effects of the Separation.