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Loss before Income Taxes for Domestic and Non-U.S. Continuing Operations (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Loss from continuing operations before income taxes and noncontrolling interest:    
U.S. $ (13,284) $ (43,518)
Foreign (287) 4,520
Loss before income taxes and noncontrolling interest $ (13,571) $ (38,998)