Income Taxes - Summary of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (38)	$ 4	$ 7
State	1,152	289	245
Foreign	490	41
Total	1,604	334	252
Deferred:
Federal	(1,184)	(2,323)	(3,639)
State	553	(1,132)	(1,581)
Foreign	(122)
Total	(753)	(3,455)	(5,220)
Income tax expense (benefit)	$ 851	$ (3,121)	$ (4,968)