Marketable securities

6 Months Ended

Jun. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Marketable securities

Marketable securities

The following table summarizes the marketable securities held at June 30, 2022 and December 31, 2021 (in thousands):        

Description	Amortized cost / Cost		Unrealized gains		Unrealized losses		Fair value
June 30, 2022
U.S. government agency securities and treasuries	$	77,943	$	—	$	(1,980)	$	75,963
Corporate bonds	13,294				(105)		13,189
Commercial paper	2,499		—		—		2,499
Equity securities	—		—		—		—
Total	$	93,736	$	—	$	(2,085)	$	91,651
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

No available-for-sale debt securities held as of June 30, 2022 or December 31, 2021 had remaining maturities greater than five years.