Note 15 - 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, 2021	Jul. 31, 2020
Net loss for the year	$ (14,813,810)	$ (14,610,516)
Basic Weighted Average Number of Shares (in shares)	210,295,992	183,041,766
Dilutive Stock Options, RSUs, PRSUs and Warrants (in shares)
Diluted Weighted Average Number of Shares (in shares)	210,295,992	183,041,766
Net Loss per Share, Basic and Diluted (in dollars per share)	$ (0.07)	$ (0.08)