Income Taxes - Summary of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ (133)	$ (132)
State	6	7
Foreign	134	108
Total current	7	(17)
Deferred:
Federal	155	144
State	24
Foreign	(26)	(47)
Total deferred	153	97
Total income tax expense	$ 160	$ 80