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STOCKHOLDERS' EQUITY (Details) - shares
Jul. 31, 2018
Apr. 30, 2018
Jul. 31, 2017
Increase (Decrease) in Stockholders' Equity      
Balance beginning of year (in shares) 5,995,750 5,995,750 5,995,750
Balance end of year (in shares) 5,995,750 5,995,750 5,995,750