Available-for-Sale Marketable Securities - Summary of Available-for-Sale Marketable Securities by Major Type of Security (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 223,694	$ 219,734
Gross Unrealized Gains	5	123
Gross Unrealized Losses	(363)	(50)
Estimated Fair Value	223,336	219,807
U.S. Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,573	20,710
Gross Unrealized Gains		41
Gross Unrealized Losses	(3)	(1)
Estimated Fair Value	11,570	20,750
U.S. Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,020	22,125
Gross Unrealized Gains		4
Gross Unrealized Losses	(45)	(1)
Estimated Fair Value	16,975	22,128
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	66,495	49,080
Gross Unrealized Gains		61
Gross Unrealized Losses	(171)	(23)
Estimated Fair Value	66,324	49,118
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	106,914	116,139
Gross Unrealized Gains	5	5
Gross Unrealized Losses	(31)	(17)
Estimated Fair Value	106,888	116,127
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	21,692	11,680
Gross Unrealized Gains		12
Gross Unrealized Losses	(113)	(8)
Estimated Fair Value	$ 21,579	$ 11,684