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Income Taxes - Schedule of Components of Loss Before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
United States $ (2,670) $ 2,201 $ (57,970)
International (9,108) (4,567) (2,571)
loss before income taxes $ (11,778) $ (2,366) $ (60,541)