Note 15 - 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	3 Months Ended						9 Months Ended
	Apr. 30, 2023	Jan. 31, 2023	Oct. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Oct. 31, 2021	Apr. 30, 2023	Apr. 30, 2022
Net Income (loss) for the period	$ (10,960)	$ 10,892	$ (3,756)	$ 7,344	$ (5,474)	$ (2,074)	$ (3,824)	$ (204)
Basic Weighted Average Number of Shares (in shares)	375,759,521			281,668,948			360,554,427	265,709,463
Dilutive Effect of Stock Awards and Warrants (in shares)	0			10,092,007			0	0
Diluted Weighted Average Number of Shares (in shares)	375,759,521			291,760,955			360,554,427	265,709,463
Net Income (Loss) Per Share - Basic (in dollars per share)	$ (0.03)			$ 0.03			$ (0.01)	$ (0.00)
Net Income (Loss) Per Share - Diluted (in dollars per share)	$ (0.03)			$ 0.03			$ (0.01)	$ (0.00)