Income Taxes - Components of the Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 603	$ 618	$ 2,278
State	2,054	911	1,173
Foreign	1,963	2,399	1,763
Total current	4,620	3,928	5,214
Deferred:
Federal	490	(1,454)	2,111
State	(1,641)	(2,005)	667
Foreign	(526)	(498)	153
Total deferred	(1,677)	(3,957)	2,931
Income tax expense (benefit)	$ 2,943	$ (29)	$ 8,145