Income Taxes - Components of (Benefit) Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current income tax expense (benefit):
Federal	$ 221	$ 0	$ (21)
State	149	145	186
Foreign	634	526	2,525
Total current	1,004	671	2,690
Deferred income tax (benefit) expense:
Federal	(1,363)	238	229
State	(154)	24	15
Foreign	1,194	154	245
Total deferred	(323)	416	489
Total income tax expense	$ 681	$ 1,087	$ 3,179