Income Taxes - Schedule of Provision for (Benefit from) Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current income taxes:
Federal	$ (649)	$ (23)
State	11	(12)
Foreign	17	(26)	$ (11)
Total current income taxes	(621)	(61)	(11)
Deferred income taxes:
Federal	30	(37)
State	105	65
Foreign	2	26	74
Total deferred income taxes	137	54	74
Total income tax (provision) benefit	$ (484)	$ (7)	$ 63