Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Balance of gross unrecognized tax benefits, beginning of period	$ 3,200	$ 3,422
Gross amounts of increases in unrecognized tax benefits as a result of tax positions taken in the current period	133	154
Gross amounts of decreases in unrecognized tax benefits as a result of tax positions taken in the prior period	(500)	(337)
Gross amounts of decrease due to release	(47)	(39)
Balance of gross unrecognized tax benefits, end of period	$ 2,786	$ 3,200