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Income Taxes - Schedule of Income (Loss) Before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Income Tax Disclosure [Abstract]      
U.S. $ (29,436) $ (40,277) $ (91,558)
Foreign 8,688 (8,563) 36,152
Loss before income tax expense $ (20,748) $ (48,840) $ (55,406)