Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments in Marketable Securities

The Company's investments in marketable securities are stated at fair value and are available-for-sale. The following table summarizes the Company's investments in marketable securities (in thousands):

		Available-for-Sale Securities at March 31, 2022
	Maturity	Amortized Cost Basis		Gross Unrealized Losses		Fair Value
Short-term marketable securities
U.S. Treasury notes	Within one year	$	188,665	$	(527)	$	188,138
U.S. Government-sponsored enterprise securities	Within one year	78,375		(700)		77,675
Total short-term marketable securities		$	267,040	$	(1,227)	$	265,813
Long-term marketable securities
U.S Treasury notes	Within two years	$	11,040	$	(72)	$	10,968
U.S. Government-sponsored enterprise securities	Within two years	22,044		(288)		21,756
Total long-term marketable securities		$	33,084	$	(360)	$	32,724

		Available-for-Sale Securities at  December 31, 2021
	Maturity	Amortized Cost Basis		Gross Unrealized Losses		Fair Value
Short-term marketable securities
U.S. Treasury notes	Within one year	$	226,136	$	(344)	$	225,792
U.S. Government-sponsored enterprise securities	Within one year	49,618		(70)		49,548
Total short-term marketable securities		$	275,754	$	(414)	$	275,340
Long-term marketable securities
U.S Treasury notes	Within two years	$	—	$	—	$	—
U.S. Government-sponsored enterprise securities	Within two years	64,596		(200)		64,396
Total long-term marketable securities		$	64,596	$	(200)	$	64,396