Investments - Schedule of Marketable Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 424,934	$ 320,166
Gross Unrealized Gains	14	186
Gross Unrealized Losses	(398)	(191)
Fair Value	424,550	320,161
U.S. treasury securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	167,659	128,479
Gross Unrealized Gains	3	124
Gross Unrealized Losses	(96)	(27)
Fair Value	167,566	128,576
Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	53,138	47,415
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(68)	(35)
Fair Value	53,070	47,381
Corporate notes and obligations
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	204,137	139,747
Gross Unrealized Gains	11	61
Gross Unrealized Losses	(234)	(128)
Fair Value	$ 203,914	139,680
Time deposits
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		4,525
Gross Unrealized Gains		0
Gross Unrealized Losses		(1)
Fair Value		$ 4,524