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Note 13 - Loss Per Share - Weighted Average Number of Shares Used in the Calculation of the Basic and Diluted Loss Per Share (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2019
Jan. 31, 2018
Numerator        
Net Loss for the Period $ (2,349,674) $ (4,353,813) $ (5,801,100) $ (8,909,653)
Denominator        
Basic Weighted Average Number of Shares (in shares) 177,061,313 156,207,557 171,729,303 155,170,537
Dilutive Stock Options and Warrants (in shares)
Diluted Weighted Average Number of Shares (in shares) 177,061,313 156,207,557 171,729,303 155,170,537
NET LOSS PER SHARE, BASIC AND DILUTED (in dollars per share) $ (0.01) $ (0.03) $ (0.03) $ (0.06)