Marketable Securities (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2022	Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
U.S. Treasury securities	1 or less	$	185,203	$	1	$	(641	)	$	184,563
U.S. Government agency securities	1 or less		2,500		—		(21	)		2,479
Negotiable certificates of deposit	1 or less		1,676		—		(8	)		1,668
Corporate debt securities	1 or less		3,056		—		(35	)		3,021
U.S. Treasury securities	1 - 2		47,689		—		(996	)		46,693
U.S. Government agency securities	1 - 2		2,500		—		(30	)		2,470
Negotiable certificates of deposit	1 - 2		2,197		—		(35	)		2,162
Corporate debt securities	1 - 2		15,014		—		(261	)		14,753
Total		$	259,835	$	1	$	(2,027	)	$	257,809

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