Investments - Amortized Cost (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Cost	$ 393,897	$ 419,783
Gross Unrealized Gains	3	14
Gross Unrealized Losses	(4,229)	(922)
Fair Value	389,671	418,875
Included in cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cost		950
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Fair Value		950
Included in marketable securities
Debt Securities, Available-for-sale [Line Items]
Cost	393,897	418,833
Gross Unrealized Gains	3	14
Gross Unrealized Losses	(4,229)	(922)
Fair Value	389,671	417,925
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Cost	191,075	161,938
Gross Unrealized Gains	3	1
Gross Unrealized Losses	(2,598)	(474)
Fair Value	188,480	161,465
U.S. agency and government sponsored securities
Debt Securities, Available-for-sale [Line Items]
Cost	4,999	4,995
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(75)	(25)
Fair Value	4,924	4,970
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cost	74,755	40,788
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(232)	(4)
Fair Value	74,523	40,784
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cost	111,123	165,522
Gross Unrealized Gains	0	13
Gross Unrealized Losses	(1,214)	(345)
Fair Value	109,909	165,190
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cost	11,945	46,540
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(110)	(74)
Fair Value	$ 11,835	$ 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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