Note 18 - Income (Loss) Per Share - Weighted Average Number of Shares Used in the Calculation of the Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Net Income (Loss) for the Year	$ 5,252	$ (14,813)	$ (14,610)
Basic Weighted Average Number of Shares (in shares)	271,019,472	210,295,992	183,041,766
Dilutive Effect of Stock Awards and Warrants (in shares)	9,082,601	0	0
Diluted Weighted Average Number of Shares (in shares)	280,102,073	210,295,992	183,041,766
Net Income (Loss) Per Share - Basic (in dollars per share)	$ 0.02	$ (0.07)	$ (0.08)
Net Income (Loss) Per Share - Diluted (in dollars per share)	$ 0.02	$ (0.07)	$ (0.08)