Income Tax - Reconciliation of Unrecognized Tax Benefits of Uncertain Tax Positions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, Beginning Balance	$ 767	$ 724	$ 717
Gross increases (decreases) related to prior period tax positions	(6)	43	7
Unrecognized tax benefits, Ending Balance	$ 761	$ 767	$ 724