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Investments - Summary of fair value of available for sale securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Fair Value	$ 420,850	$ 124,420
Money market funds
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	20,884	29,806
Fair Value	20,884	29,806
U.S. treasury securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		24,835
Fair Value		24,835
Cash equivalents
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	20,884	54,641
Fair Value	20,884	54,641
US treasury securities, short term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	420,331	124,352
Unrealized Gains	519	69
Unrealized Losses		(1)
Fair Value	420,850	124,420
US treasury securities, long term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	111,710	25,059
Unrealized Gains	261	9
Unrealized Losses	(16)
Fair Value	111,955	25,068
Available-for-sale investments - short-term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	420,331	124,352
Unrealized Gains	519	69
Unrealized Losses		(1)
Fair Value	420,850	124,420
Available-for-sale investments - long-term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	111,710	25,059
Unrealized Gains	261	9
Unrealized Losses	(16)
Fair Value	$ 111,955	$ 25,068

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