Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2021

Marketable Securities [Abstract]

Summary of Marketable Securities

Marketable securities at December 31, 2021 consisted of the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Loss			Fair Value
Marketable securities:
Corporate debt securities	$	308,952	$	1	$	(653	)	$	308,300
U.S. government debt securities		37,988		—		(105	)		37,883
U.S. Treasury securities		29,190		—		(18	)		29,172
Total marketable securities, current and non-current	$	376,130	$	1	$	(776	)	$	375,355

Marketable securities at December 31, 2020 consisted of the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Loss		Fair Value
Marketable securities
U.S. Treasury securities	$	189,949	$	13	$	—	$	189,962
Total marketable securities, current	$	189,949	$	13	$	—	$	189,962