Investments - Amortized Cost (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Cost	$ 144,564	$ 393,897
Gross Unrealized Gains	29	3
Gross Unrealized Losses	(27)	(4,229)
Fair Value	144,566	389,671
Included in cash and cash equivalents
Debt Securities, Available-for-sale [Line Items]
Cost	1,595
Gross Unrealized Gains	0
Gross Unrealized Losses	(1)
Fair Value	1,594
Included in marketable securities
Debt Securities, Available-for-sale [Line Items]
Cost	142,969	393,897
Gross Unrealized Gains	29	3
Gross Unrealized Losses	(26)	(4,229)
Fair Value	142,972	389,671
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Cost	86,764	191,075
Gross Unrealized Gains	20	3
Gross Unrealized Losses	0	(2,598)
Fair Value	86,784	188,480
U.S. agency and government sponsored securities
Debt Securities, Available-for-sale [Line Items]
Cost	2,732	4,999
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(75)
Fair Value	2,732	4,924
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cost	10,144	74,755
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(232)
Fair Value	10,144	74,523
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cost	44,924	111,123
Gross Unrealized Gains	9	0
Gross Unrealized Losses	(27)	(1,214)
Fair Value	$ 44,906	109,909
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Cost		11,945
Gross Unrealized Gains		0
Gross Unrealized Losses		(110)
Fair Value		$ 11,835