Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Unrecognized tax benefits at beginning of period	$ 10,110	$ 10,842
Decreases related to expired carryforwards	(1,296)	(1,171)
Increases related to prior year tax positions	112
Increases related to current year tax positions	440	439
Unrecognized tax benefits at end of period	$ 9,366	$ 10,110