Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities

Marketable securities by security type consisted of the following:

	December 31, 2022
(in thousands)	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
U.S. treasury bills and notes	$	228,432	$	13	$	(301	)	$	228,144
U.S. agency securities		211,658		68		(474	)		211,252
Total	$	440,090	$	81	$	(775	)	$	439,396

	December 31, 2021
(in thousands)	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
U.S. treasury bills and notes	$	277,559	$	—	$	(218	)	$	277,341
U.S. agency securities		18,781		—		(10	)		18,771
Total	$	296,340	$	—	$	(228	)	$	296,112

The remaining contractual maturities of all marketable securities were less than 18 months as of December 31, 2022 and 2021.