Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross unrecognized tax benefits at the beginning of the year	$ 11,710	$ 9,954	$ 9,033
Additions from tax positions taken in the current year	2,555	1,706	1,017
Additions from tax positions taken in prior years	12	50	0
Reductions from tax positions taken in prior years	0	0	(96)
Gross unrecognized tax benefits at end of the year	$ 14,277	$ 11,710	$ 9,954