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Fair Value Measurements - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Assets:
Marketable securities	$ 1,110,207	$ 972,611
Fair Value Recurring [Member]
Assets:
Cash equivalents	251,567	135,902
Total Assets	1,361,774	1,108,513
Fair Value Recurring [Member] | Commercial Paper [Member]
Assets:
Marketable securities	107,884	251,309
Fair Value Recurring [Member] | Corporate bonds [Member]
Assets:
Marketable securities	774,506	468,617
Fair Value Recurring [Member] | Government and agency securities [Member]
Assets:
Marketable securities	207,990	162,886
Fair Value Recurring [Member] | U.S. treasury bills [Member]
Assets:
Marketable securities	19,827	89,799
Fair Value Recurring [Member] | Related Party Revenue Share Liability [Member]
Liabilities:
Total liabilities	73,160	17,940
Fair Value Recurring [Member] | Fair value, inputs, level 1 [Member]
Assets:
Cash equivalents	251,567	135,902
Total Assets	251,567	135,902
Fair Value Recurring [Member] | Fair value, inputs, level 2 [Member]
Assets:
Total Assets	1,110,207	972,611
Fair Value Recurring [Member] | Fair value, inputs, level 2 [Member] | Commercial Paper [Member]
Assets:
Marketable securities	107,884	251,309
Fair Value Recurring [Member] | Fair value, inputs, level 2 [Member] | Corporate bonds [Member]
Assets:
Marketable securities	774,506	468,617
Fair Value Recurring [Member] | Fair value, inputs, level 2 [Member] | Government and agency securities [Member]
Assets:
Marketable securities	207,990	162,886
Fair Value Recurring [Member] | Fair value, inputs, level 2 [Member] | U.S. treasury bills [Member]
Assets:
Marketable securities	19,827	89,799
Fair Value Recurring [Member] | Fair value, inputs, level 3 [Member] | Related Party Revenue Share Liability [Member]
Liabilities:
Total liabilities	$ 73,160	$ 17,940

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Fair value portion of asset recognized for present right to economic benefit.

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