Income Taxes - Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ 265	$ (208)	$ (782)
State	2,386	1,285	1,712
International	218	325	356
Current provision (benefit) for income taxes	2,869	1,402	1,286
Deferred
Federal		(277)
State	0	0	0
International	99	70	(272)
Deferred provision (benefit) for income taxes	99	(207)	(272)
Provision (benefit) for income taxes	$ 2,968	$ 1,195	$ 1,014