Note 15 - 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
	Oct. 31, 2022	Oct. 31, 2021
Net loss for the period	$ (3,756)	$ (2,074)
Basic and Diluted (in shares)	336,790,726	246,859,322
Dilutive Stock Options, RSUs, PRSUs and Warrants (in shares)	0	0
Diluted Weighted Average Number of Shares (in shares)	336,790,726	246,859,322
Basic and Diluted (in dollars per share)	$ (0.01)	$ (0.01)