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UNAUDITED CONDENSED INTERIM CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Oct. 31, 2019
Jul. 31, 2019
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 750,000,000 750,000,000
Common stock, shares issued 44,336,023 62,290,940
Common stock, shares outstanding 44,336,023 62,290,940