Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Debt Securities, Available-for-sale

The following are summaries of the Company's marketable securities at September 30, 2023 and December 31, 2022 (in thousands).

September 30, 2023	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. government agency securities and treasuries	$	250,310	$	3	$	(310)	$	250,003
Corporate debt securities	48,885		—		(177)		48,708
Total securities with a maturity of one year or less	$	299,195	$	3	$	(487)	$	298,711
U.S. government agency securities and treasuries	2,997		—		(12)		2,985
Corporate debt securities	—		—		—		—
Total securities with a maturity of more than one year	$	2,997	$	—	$	(12)	$	2,985
Total available-for-sale securities	$	302,192	$	3	$	(499)	$	301,696

December 31, 2022	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
U.S. government agency securities and treasuries	$	100,555	$	—	$	(1,159)	$	99,396
Corporate debt securities	41,615		—		(774)		40,841
Total securities with a maturity of one year or less	$	142,170	$	—	$	(1,933)	$	140,237
U.S. government agency securities and treasuries	—		—		—		—
Corporate debt securities	3,442		—		(124)		3,318
Total securities with a maturity of more than one year	$	3,442	$	—	$	(124)	$	3,318
Total available-for-sale securities	$	145,612	$	—	$	(2,057)	$	143,555