Marketable Securities and Fair Value of Financial Assets and Liabilities - Summary of Marketable Securities (Detail) - U.S. Treasury Bills and Notes (Due within One Year) [Member] - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Amortized Cost	$ 611,898	$ 588,397
Marketable Securities, Gross Unrealized Gains	4	363
Marketable Securities, Gross Unrealized Losses	(774)	(7)
Marketable Securities, Fair Value	$ 611,128	$ 588,753

Marketable Securities and Fair Value of Financial Assets and Liabilities - Summary of Marketable Securities (Detail) - U.S. Treasury Bills and Notes (Due within One Year) [Member] - USD ($)
$ in Thousands

Jun. 30, 2026

Dec. 31, 2025

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Marketable Securities, Amortized Cost

$ 611,898

$ 588,397

Marketable Securities, Gross Unrealized Gains

363

Marketable Securities, Gross Unrealized Losses

(774)

(7)

Marketable Securities, Fair Value

$ 611,128

$ 588,753

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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+ Details