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Note 14 - Net Loss Per Share - Weighted Average Number of Shares Used in the Calculation of the Basic and Diluted Loss Per Share (Details) - USD ($)
12 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2017
Net loss for the year $ (17,152,789) $ (17,826,634) $ (17,971,056)
Basic Weighted Average Number of Shares (in shares) 175,844,624 157,123,025 128,244,751
Dilutive Stock Options and Warrants (in shares)
Diluted Weighted Average Number of Shares (in shares) 175,844,624 157,123,025 128,244,751
NET LOSS PER SHARE, BASIC AND DILUTED (in dollars per share) $ (0.10) $ (0.11) $ (0.14)