Income Taxes - Components of Income (Loss) Domestic and Foreign (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of Income (Loss) Domestic and Foreign [Abstract]
United States	$ (9,763)	$ (25,142)	$ 6,025
Foreign	1,140	(661)	1,840
(Loss) income before taxes	$ (8,623)	$ (25,803)	$ 7,865