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STOCKHOLDERS' EQUITY (Details) - shares
Jul. 31, 2017
Apr. 30, 2017
Jul. 31, 2016
Increase (Decrease) in Stockholders' Equity      
Balance beginning of year (in shares) 5,995,750 5,615,750 5,615,750
Balance end of year (in shares) 5,995,750 5,995,750 5,615,750