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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 9 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2018
Net loss for the period $ (5,017,557) $ (4,146,646) $ (10,818,657) $ (13,056,299)
Basic Weighted Average Number of Shares (in shares) 179,348,614 157,704,601 174,213,254 155,996,660
Dilutive Stock Options and Warrants (in shares)
Diluted Weighted Average Number of Shares (in shares) 179,348,614 157,704,601 174,213,254 155,996,660
NET LOSS PER SHARE, BASIC AND DILUTED (in dollars per share) $ (0.03) $ (0.03) $ (0.06) $ (0.08)