Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 0	$ 0	$ 0
State	(1)	1	1
Foreign	529	(482)	1,838
Total Current	528	(481)	1,839
Deferred:
Federal	0	0	422
State	0	0	49
Foreign	(22)	(31)	(65)
Total Deferred	(22)	(31)	406
Provision (benefit) for income taxes	$ 506	$ (512)	$ 2,245