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				6 Months Ended
	Jan. 31, 2023	Oct. 31, 2022	Jan. 31, 2022	Oct. 31, 2021	Jan. 31, 2023	Jan. 31, 2022
Net Income (loss) for the period	$ 10,892	$ (3,756)	$ (5,474)	$ (2,074)	$ 7,136	$ (7,548)
Basic Weighted Average Number of Shares (in shares)	369,608,851		269,120,537		353,199,789	257,989,930
Dilutive Stock Options, RSUs, PRSUs and Warrants (in shares)	8,216,694		0		8,216,694	0
Diluted Weighted Average Number of Shares (in shares)	377,825,545		269,120,537		361,416,483	257,989,930
Net Income (Loss) Per Share - Basic (in dollars per share)	$ 0.03		$ (0.02)		$ 0.02	$ (0.03)
Net Income (Loss) Per Share - Diluted (in dollars per share)	$ 0.03		$ (0.02)		$ 0.02	$ (0.03)