Investments - Amortized Cost (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Cost	$ 507,932	$ 419,783
Gross Unrealized Gains	0	14
Gross Unrealized Losses	(6,005)	(922)
Fair Value	501,927	418,875
Included in cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cost	7,499	950
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	0
Fair Value	7,498	950
Included in marketable securities
Debt Securities, Available-for-sale [Line Items]
Cost	500,433	418,833
Gross Unrealized Gains	0	14
Gross Unrealized Losses	(6,004)	(922)
Fair Value	494,429	417,925
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Cost	241,313	161,938
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(3,556)	(474)
Fair Value	237,757	161,465
U.S. agency and government sponsored securities
Debt Securities, Available-for-sale [Line Items]
Cost	4,997	4,995
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(116)	(25)
Fair Value	4,881	4,970
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cost	82,168	40,788
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(156)	(4)
Fair Value	82,012	40,784
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cost	147,720	165,522
Gross Unrealized Gains	0	13
Gross Unrealized Losses	(1,838)	(345)
Fair Value	145,882	165,190
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cost	31,734	46,540
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(339)	(74)
Fair Value	$ 31,395	$ 46,466

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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