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Short-Term Investments - Summary of Short-term Investments Classified as Available-for-sale Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 71,338	$ 46,490
Unrealized Gains	105
Unrealized Losses	(3)
Fair Value	71,440	46,490
U.S. Government Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	67,745	33,213
Unrealized Gains	105
Unrealized Losses	(3)
Fair Value	67,847	33,213
U.S. Government Agency Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	3,593	13,277
Unrealized Gains	0
Unrealized Losses	0
Fair Value	$ 3,593	$ 13,277

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