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Warrants Outstanding (Detail) - $ / shares
 3 Months Ended 12 Months Ended
Jun. 30, 2017
Mar. 31, 2017
Mar. 31, 2016
Class of Warrant or Right [Line Items]      
Weighted Average Per Share Intrinsic Value, Outstanding $ 4.68 $ 3.12 $ 0.46
Weighted Average Per Share Intrinsic Value, Granted 0 0 0
Weighted Average Per Share Intrinsic Value, Exercised 0 4.87 0
Weighted Average Per Share Intrinsic Value, Cancelled 0 0 0
Weighted Average Per Share Intrinsic Value, Outstanding $ 6.41 $ 4.68 $ 3.12
Number of warrants, Outstanding 1,970,166 2,091,166 914,500
Number of warrants, Granted 0 29,000 1,676,666
Number of warrants, Exercised 0 (150,000) (500,000)
Number of warrants, Cancelled 0 0 0
Number of warrants, Outstanding 1,970,166 1,970,166 2,091,166