Income Taxes - Schedule of Components of Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal		$ 144	$ (690)
State	$ 172	(473)	147
Foreign	137	111	124
Current, Total	309	(218)	(419)
Deferred:
Federal	(55)	(274)	(6)
Foreign	(23)	91
Deferred Income Tax Expense (Benefit)	(78)	(183)	(6)
Provision (benefit) for income taxes	$ 231	$ (401)	$ (425)