Cash Equivalents and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2021

Cash and Cash Equivalents [Abstract]

Schedule of Fair Value and Amortized Cost of Cash Equivalents

The fair value and amortized cost of cash equivalents and marketable securities by major security type as of December 31, 2021 and 2020 are presented in the following tables (in thousands):

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	206,245	$	—	$	—	$	206,245
U.S. Treasury securities	290,909		2		(1,205)		289,706
U.S. government agency securities	93,864		2		(240)		93,626
Corporate debt securities	285,338		—		(182)		285,156
Total cash equivalents and marketable securities	$	876,356	$	4	$	(1,627)	$	874,733

Classified as:	Fair Value
Cash equivalents	$	270,236
Marketable securities	320,966
Marketable securities, non-current	283,531
Total cash equivalents and marketable securities	$	874,733

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	50,513	$	—	$	—	$	50,513
U.S. Treasury securities	202,674		27		—		202,701
U.S. government agency securities	205,558		207		(1)		205,764
Corporate debt securities	211,086		34		(11)		211,109
Total cash equivalents and marketable securities	$	669,831	$	268	$	(12)	$	670,087

Classified as:	Fair Value
Cash equivalents	$	117,879
Marketable securities	472,213
Marketable securities, non-current	79,995
Total cash equivalents and marketable securities	$	670,087

Schedule of Fair Value and Amortized Cost of Marketable Securities

The fair value and amortized cost of cash equivalents and marketable securities by major security type as of December 31, 2021 and 2020 are presented in the following tables (in thousands):

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	206,245	$	—	$	—	$	206,245
U.S. Treasury securities	290,909		2		(1,205)		289,706
U.S. government agency securities	93,864		2		(240)		93,626
Corporate debt securities	285,338		—		(182)		285,156
Total cash equivalents and marketable securities	$	876,356	$	4	$	(1,627)	$	874,733

Classified as:	Fair Value
Cash equivalents	$	270,236
Marketable securities	320,966
Marketable securities, non-current	283,531
Total cash equivalents and marketable securities	$	874,733

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	50,513	$	—	$	—	$	50,513
U.S. Treasury securities	202,674		27		—		202,701
U.S. government agency securities	205,558		207		(1)		205,764
Corporate debt securities	211,086		34		(11)		211,109
Total cash equivalents and marketable securities	$	669,831	$	268	$	(12)	$	670,087

Classified as:	Fair Value
Cash equivalents	$	117,879
Marketable securities	472,213
Marketable securities, non-current	79,995
Total cash equivalents and marketable securities	$	670,087