Marketable securities (Tables)

12 Months Ended

Dec. 31, 2023

Marketable Securities [Abstract]

Summary of marketable securities

Marketable securities at December 31, 2023 consisted of the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Marketable securities, current:
Corporate debt securities	$	100,903	$	16	$	(221)	$	100,698
U.S. government debt securities	20,457		14		(43)		20,428
U.S. Treasury securities	5,965		1		—		5,966
Marketable securities, non-current
Corporate debt securities	27,901		120		(14)		28,007
Total marketable securities, current and non-current	$	155,226	$	151	$	(278)	$	155,099

Marketable securities at December 31, 2022 consisted of the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Marketable securities, current:
Corporate debt securities	$	183,270	$	2	$	(2,068)	$	181,204
U.S. government debt securities	40,986		—		(1,184)		39,802
U.S. Treasury securities	25,650		—		(257)		25,393
Marketable securities, non-current
Corporate debt securities	53,592		2		(471)		53,123
U.S. government debt securities	8,000		—		(161)		7,839
Total marketable securities, current and non-current	$	311,498	$	4	$	(4,141)	$	307,361

Summary of marketable securities in unrealized loss position

Marketable securities in unrealized loss positions as of December 31, 2023 consisted of the following (in thousands, except number of securities):

	Number of Securities	Fair Value		Gross Unrealized Losses
Marketable securities in continuous unrealized loss position for less than 12 months:
Corporate debt securities	64	$	68,563	$	(146)
U.S. government debt securities	9	11,914		(22)
Marketable securities in continuous unrealized loss position for greater than 12 months:
Corporate debt securities	18	22,138		(89)
U.S. government debt securities	3	5,979		(21)
Total marketable securities in unrealized loss position	94	$	108,594	$	(278)

Marketable securities in unrealized loss positions as of December 31, 2022 consisted of the following (in thousands, except number of securities):

	Number of Securities	Fair Value		Gross Unrealized Losses
Marketable securities in continuous unrealized loss position for less than 12 months:
Corporate debt securities	63	$	134,027	$	(1,262)
U.S. government debt securities	6	15,748		(245)
U.S. Treasury securities	4	5,575		(11)
Marketable securities in continuous unrealized loss position for greater than 12 months:
Corporate debt securities	36	82,375		(1,277)
U.S. government debt securities	7	31,892		(1,100)
U.S. Treasury securities	4	19,817		(246)
Total marketable securities in unrealized loss position	120	$	289,434	$	(4,141)