Fair Value Measurements - Summary of Company's Investments (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Investments, Amortized cost	$ 36,922	$ 34,935
Investments, Gross unrealized gains		1,254
Investments, Gross unrealized losses	(1,047)	(111)
Investments, Fair value	35,875	36,078
U.S. Treasuries [Member]
Schedule Of Available For Sale Securities [Line Items]
Trading securities, Amortized cost	24,883	24,994
Trading securities, Gross unrealized losses	(320)	(111)
Trading securities, Fair value	24,563	24,883
Mutual Funds Held In Rabbi Trust [Member]
Schedule Of Available For Sale Securities [Line Items]
Trading securities, Amortized cost	12,039	9,941
Trading securities, Gross unrealized gains		1,254
Trading securities, Gross unrealized losses	(727)
Trading securities, Fair value	$ 11,312	$ 11,195