Investment Securities (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Summary of Available-For-Sale Investment Securities Held by the Company

Available-for-sale investment securities consisted of the following as of December 31, 2022 and 2021 (in thousands):

	As of December 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Available-for-sale investment securities:
U.S. government and agency obligations	$	154,228	$	12	$	(1,510	)	$	152,730
Certificates of deposit		4,629		—		(94	)		4,535
Corporate debt securities		145,330		—		(2,336	)		142,994
Asset-backed securities		1,497		—		(3	)		1,494
Total	$	305,684	$	12	$	(3,943	)	$	301,753

	As of December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Available-for-sale investment securities:
U.S. government and agency obligations	$	54,637	$	—	$	(180	)		54,457
Certificates of deposit		5,735		1		(4	)		5,732
Corporate debt securities		70,600		6		(204	)		70,402
Asset-backed securities		2,421		—		—			2,421
Total	$	133,393	$	7	$	(388	)	$	133,012

Summary of Available-For-Sale Investment Securities By Contractual Maturity

As of December 31, 2022 and 2021, available-for-sale investment securities by contractual maturity were as follows (in thousands):

	As of December 31, 2022				As of December 31, 2021
	Amortized Cost		Fair Market Value		Amortized Cost		Fair Market Value
Available-for-sale investment securities:
Due in one year or less	$	246,276	$	243,542	$	31,101	$	31,078
Due after one year through five years		59,408		58,211		102,292		101,934
Total	$	305,684	$	301,753	$	133,393	$	133,012

Summary of Available-For-Sale Securities Investment

As of December 31, 2022, available-for-sale investment securities by length of time in a net loss position were as follows (in thousands):

	As of December 31, 2022
	Less Than 12 Months					More Than 12 Months					Total
	Fair Market Value		Gross Unrealized Losses			Fair Market Value		Gross Unrealized Losses			Fair Market Value		Gross Unrealized Losses
Available-for-sale investment securities:
U.S. government and agency obligations	$	95,933	$	(702	)	$	36,681	$	(808	)	$	132,614	$	(1,510	)
Certificates of deposit		2,399		(47	)		2,136		(47	)		4,535		(94	)
Corporate debt securities		96,663		(1,399	)		43,330		(937	)		139,993		(2,336	)
Asset-backed securities		1,494		(3	)		—		—			1,494		(3	)
Total	$	196,489	$	(2,151	)	$	82,147	$	(1,792	)	$	278,636	$	(3,943	)