Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Total assets	$ 41,909	$ 35,430
Money market securities (cash equivalents) [Member]
Assets
Total assets	41,859	35,380
Restricted cash [Member]
Assets
Total assets	50	50
Level 1 [Member]
Assets
Total assets	41,909	35,430
Level 1 [Member] | Money market securities (cash equivalents) [Member]
Assets
Total assets	41,859	35,380
Level 1 [Member] | Restricted cash [Member]
Assets
Total assets	$ 50	$ 50