Cash Equivalents and Marketable Securities - Schedule of Estimated Fair Value of Cash Equivalents and Marketable Securities and Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Cash equivalents, amortized cost	$ 71,847	$ 83,991
Cash equivalents, gross unrealized gains	0	0
Cash equivalents, gross unrealized losses	0	0
Cash equivalents, estimated fair value	71,847	83,991
Marketable securities, amortized cost	994,562	669,942
Marketable securities, gross unrealized gains	12	986
Marketable securities, gross unrealized losses	(5,394)	(116)
Marketable securities, estimated fair value	989,180	670,812
Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Marketable securities, amortized cost	376,082	184,423
Marketable securities, gross unrealized gains	1	25
Marketable securities, gross unrealized losses	(655)	(80)
Marketable securities, estimated fair value	375,428	184,368
Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Marketable securities, amortized cost	135,058	100,753
Marketable securities, gross unrealized gains	0	60
Marketable securities, gross unrealized losses	(743)	(23)
Marketable securities, estimated fair value	134,315	100,790
U.S. government treasury securities
Debt Securities, Available-for-Sale [Line Items]
Marketable securities, amortized cost	307,521	265,316
Marketable securities, gross unrealized gains	11	748
Marketable securities, gross unrealized losses	(1,996)	0
Marketable securities, estimated fair value	305,536	266,064
U.S. government agency securities
Debt Securities, Available-for-Sale [Line Items]
Marketable securities, amortized cost	175,901	119,450
Marketable securities, gross unrealized gains	0	153
Marketable securities, gross unrealized losses	(2,000)	(13)
Marketable securities, estimated fair value	173,901	119,590
Money market funds
Debt Securities, Available-for-Sale [Line Items]
Cash equivalents, amortized cost	71,847	74,004
Cash equivalents, gross unrealized gains	0	0
Cash equivalents, gross unrealized losses	0	0
Cash equivalents, estimated fair value	$ 71,847	74,004
Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Cash equivalents, amortized cost		9,987
Cash equivalents, gross unrealized gains		0
Cash equivalents, gross unrealized losses		0
Cash equivalents, estimated fair value		$ 9,987