Income Taxes - Summary of Company's Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal		$ (10)	$ 36
State	$ 155	29	198
International	243	704	376
Total	398	723	610
Deferred:
Federal	(6,256)	(1,570)	1,363
State	(455)	(214)	335
International	251	(285)	35
Valuation allowance	7,287	1,754	(1,048)
Total	827	(315)	685
Income taxes	$ 1,225	$ 408	$ 1,295