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Debt - Schedule of Long Term Debt (Detail) - USD ($)
$ in Thousands
Sep. 30, 2016
Mar. 31, 2016
Debt Instrument [Line Items]    
Short-term debt $ 0 $ 10,432
Debt discount, short-term 0 568
Long-term debt 9,384 0
Debt discount, long-term 6,616 0
Revolving line of credit, principal    
Debt Instrument [Line Items]    
Short-term debt 0 3,000
Senior debenture    
Debt Instrument [Line Items]    
Short-term debt 0 7,432
Convertible notes    
Debt Instrument [Line Items]    
Long-term debt $ 9,384 $ 0