Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2022

Investments Debt And Equity Securities [Abstract]

Summary of Marketable Securities

The Company’s marketable securities, which consist of highly liquid marketable debt securities, are classified as available-for-sale and are stated at fair value. The following tables summarize the Company’s marketable securities (in thousands):

As of September 30, 2022	Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
U.S. Treasury securities	1 or less	$	197,652	$	—	$	(1,938	)	$	195,714
U.S. Government agency securities	1 or less		5,000		—		(73	)		4,927
Negotiable certificates of deposit	1 or less		2,683		—		(48	)		2,635
Corporate debt securities	1 or less		16,131		—		(344	)		15,787
U.S. Treasury securities	1 - 2		41,823		—		(984	)		40,839
Negotiable certificates of deposit	1 - 2		734		—		(29	)		705
Corporate debt securities	1 - 2		1,289		—		(47	)		1,242
Total		$	265,312	$	—	$	(3,463	)	$	261,849

As of December 31, 2021	Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
U.S. Treasury securities	1 or less	$	2,492	$	—	$	(1	)	$	2,491
Negotiable certificates of deposit	1 or less		1,190		—		(1	)		1,189
U.S. Treasury securities	1 - 2		63,034		—		(153	)		62,881
Negotiable certificates of deposit	1 - 2		2,687		—		(3	)		2,684
Corporate debt securities	1 - 2		15,879		—		(29	)		15,850
Total		$	85,282	$	—	$	(187	)	$	85,095