Marketable securities

9 Months Ended

Sep. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Marketable securities

Marketable securities

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

Description	Amortized cost / Cost		Unrealized gains		Unrealized losses		Fair value
September 30, 2022
U.S. government agency securities and treasuries	$	70,456	$	—	$	(2,215)	$	68,241
Corporate bonds	6,396		—		(75)		6,321
Commercial paper	—		—		—		—
Equity securities	—		—		—		—
Total	$	76,852	$	—	$	(2,290)	$	74,562
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 September 30, 2022 or December 31, 2021 had remaining maturities greater than five years.