Note 15 - Income (Loss) Per Share - Weighted Average Number of Shares Used in the Calculation of the Basic and Diluted Loss Per Share (Details) - $ / shares	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Basic Weighted Average Number of Shares (in shares)	281,668,948	218,822,085	265,709,463	202,304,157
Dilutive Effect of Stock Awards and Warrants (in shares)	10,092,007	0	0	0
Diluted Weighted Average Number of Shares (in shares)	291,760,955	218,822,085	265,709,463	202,304,157
Basic (in dollars per share)	$ 0.03	$ (0.02)	$ (0.00)	$ (0.06)
Diluted (in dollars per share)	$ 0.03	$ (0.02)	$ (0.00)	$ (0.06)