Investments - Summary of fair value of available for sale securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Fair Value	$ 368,556	$ 124,420
Money market funds
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	23,697	29,806
Fair Value	23,697	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	23,697	54,641
Fair Value	23,697	54,641
US treasury securities, short term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	368,519	124,352
Unrealized Gains	73	69
Unrealized Losses	(36)	(1)
Fair Value	368,556	124,420
US treasury securities, long term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	145,806	25,059
Unrealized Gains	97	9
Fair Value	145,903	25,068
Available-for-sale investments - short-term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	368,519	124,352
Unrealized Gains	73	69
Unrealized Losses	(36)	(1)
Fair Value	368,556	124,420
Available-for-sale investments - long-term
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	145,806	25,059
Unrealized Gains	97	9
Fair Value	$ 145,903	$ 25,068

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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Amount, before tax, of unrealized loss 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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Amortized cost of 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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