Short-Term and Long-Term Investments - Summary of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
US Treasury Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Cost	$ 20,137	$ 45,238
Gross Unrealized Gains	0	0
Gross Unrealized Losses	134	23
Estimated Fair Value	20,003	45,215
Failed Auction Security [Member]
Debt Securities, Available-for-sale [Line Items]
Cost	3,000	3,000
Gross Unrealized Losses	464	361
Estimated Fair Value	$ 2,536	$ 2,639