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Balance Sheet Components - Summary of Amortized Cost, Gross Unrealized Holding Gains or Losses, and Fair Value of Available-for-Sale Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 71,864	$ 121,874
Gross Unrealized Holding Gains	3	30
Gross Unrealized Holding Losses	(2)	(6)
Estimated Fair Value	71,865	121,898
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,073	13,988
Gross Unrealized Holding Gains	2	9
Gross Unrealized Holding Losses	0	(5)
Estimated Fair Value	6,075	13,992
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,098	52,273
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	32,098	52,273
U.S. government bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	28,747	45,783
Gross Unrealized Holding Gains	1	20
Gross Unrealized Holding Losses	0	0
Estimated Fair Value	28,748	45,803
Agency bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,946	9,830
Gross Unrealized Holding Gains	0	1
Gross Unrealized Holding Losses	(2)	(1)
Estimated Fair Value	$ 4,944	$ 9,830

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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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