Available-for-Sale Marketable Securities - Schedule of Fair Values and Continuous Unrealized Loss Positions of Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Fair Value	$ 156,455	$ 113,891
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Gross Unrealized Losses	(354)	(50)
Available-for-sale marketable securities, continuous unrealized loss position, 12 Months or Greater, Fair Value	3,037
Available-for-sale marketable securities, continuous unrealized loss position, 12 Months or Greater, Gross Unrealized Losses	(9)
Available-for-sale marketable securities, continuous unrealized loss position, Fair Value	159,492	113,891
Available-for-sale marketable securities, continuous unrealized loss position, Gross Unrealized Losses	(363)	(50)
U.S. Treasury Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Fair Value	11,570	12,682
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Gross Unrealized Losses	(3)	(1)
Available-for-sale marketable securities, continuous unrealized loss position, Fair Value	11,570	12,682
Available-for-sale marketable securities, continuous unrealized loss position, Gross Unrealized Losses	(3)	(1)
U.S. Government Agency Obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Fair Value	9,456	2,500
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Gross Unrealized Losses	(45)	(1)
Available-for-sale marketable securities, continuous unrealized loss position, Fair Value	9,456	2,500
Available-for-sale marketable securities, continuous unrealized loss position, Gross Unrealized Losses	(45)	(1)
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Fair Value	62,704	23,553
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Gross Unrealized Losses	(170)	(23)
Available-for-sale marketable securities, continuous unrealized loss position, 12 Months or Greater, Fair Value	2,020
Available-for-sale marketable securities, continuous unrealized loss position, 12 Months or Greater, Gross Unrealized Losses	(1)
Available-for-sale marketable securities, continuous unrealized loss position, Fair Value	64,724	23,553
Available-for-sale marketable securities, continuous unrealized loss position, Gross Unrealized Losses	(171)	(23)
Commercial Paper [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Fair Value	52,163	68,897
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Gross Unrealized Losses	(31)	(17)
Available-for-sale marketable securities, continuous unrealized loss position, Fair Value	52,163	68,897
Available-for-sale marketable securities, continuous unrealized loss position, Gross Unrealized Losses	(31)	(17)
Municipal Bonds [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Fair Value	20,562	6,259
Available-for-sale marketable securities, continuous unrealized loss position, Less than 12 Months, Gross Unrealized Losses	(105)	(8)
Available-for-sale marketable securities, continuous unrealized loss position, 12 Months or Greater, Fair Value	1,017
Available-for-sale marketable securities, continuous unrealized loss position, 12 Months or Greater, Gross Unrealized Losses	(8)
Available-for-sale marketable securities, continuous unrealized loss position, Fair Value	21,579	6,259
Available-for-sale marketable securities, continuous unrealized loss position, Gross Unrealized Losses	$ (113)	$ (8)