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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	Jun. 30, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 320,371	$ 402,664
Gross Unrealized Holding Gains	0	2
Gross Unrealized Holding Losses	(4,076)	(903)
Fair Value	316,295	401,763
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	127,387	183,136
Gross Unrealized Holding Gains	0	2
Gross Unrealized Holding Losses	(1,896)	(492)
Fair Value	125,491	182,646
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	49,824	68,079
Gross Unrealized Holding Gains	0
Gross Unrealized Holding Losses	0
Fair Value	49,824	68,079
U.S. government bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	118,142	91,840
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(1,787)	(318)
Fair Value	116,355	91,522
Agency bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	15,235	23,339
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(305)	(64)
Fair Value	14,930	23,275
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,751	27,105
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(10)	(18)
Fair Value	4,741	27,087
Foreign government bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,032	9,165
Gross Unrealized Holding Gains	0	0
Gross Unrealized Holding Losses	(78)	(11)
Fair Value	$ 4,954	$ 9,154

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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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