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Investments and Fair Value Measurements - Schedule of Marketable Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Cost	$ 482,455	$ 643,067
Gross Unrealized Gains	437	590
Gross Unrealized Losses	(145)	(247)
Fair Value	482,747	643,410
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Cost	1,312	802
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	1,312	802
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Cost	257,504	442,353
Gross Unrealized Gains	325	442
Gross Unrealized Losses	(10)	(223)
Fair Value	257,819	442,572
U.S. agency and government-sponsored securities
Debt Securities, Available-for-sale [Line Items]
Cost	196,196	146,762
Gross Unrealized Gains	65	16
Gross Unrealized Losses	(135)	(18)
Fair Value	196,126	146,760
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Cost	5,767	9,600
Gross Unrealized Gains	3	8
Gross Unrealized Losses	0	0
Fair Value	5,770	9,608
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Cost	499
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	499
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Cost	21,177	43,550
Gross Unrealized Gains	44	124
Gross Unrealized Losses	0	(6)
Fair Value	$ 21,221	$ 43,668

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