Sources of Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]
Domestic	$ 2,109	$ (4,947)	$ 5,503
International	201	686	373
Income (loss) before income taxes	$ 2,310	$ (4,261)	$ 5,876