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Income Taxes - Summary of United States and Foreign Income (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 $ (17,877) $ (5,990) $ 4,634
Foreign 6,103 1,873 1,420
Total $ (11,774) $ (4,117) $ 6,054