Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2021

Investments Debt And Equity Securities [Abstract]

Components of Marketable Securities by Security Type

Marketable securities by security type consisted of the following (in thousands):

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities (due within one year)	$	63,907	$	—	$	(33	)	$	63,874
U.S. government agency bonds (due within    one year)		3,001		—		(3	)		2,998
	$	66,908	$	—	$	(36	)	$	66,872
	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. Treasury securities (due within one year)	$	74,066	$	10	$	(3	)	$	74,073
U.S. government agency bonds (due within    one year)		26,984		4		—			26,988
	$	101,050	$	14	$	(3	)	$	101,061