Income Taxes - Schedule of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits - January 1	$ 444	$ 1,847
Increases in prior year positions	1,020	27
Reversals of prior year positions	0	(1,215)
Increases in tax positions taken in current year	378	0
Statute expirations	(172)	(215)
Unrecognized tax benefits - December 31	$ 1,670	$ 444