Note 17 - Stock-Based Compensation - Performance Based Restricted Stock Units Assumptions (Details) - $ / shares	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Granted, weighted average grant date fair value (in dollars per share)	$ 5.41	$ 3.35	$ 4.8
Performance-based Restriced Stock Units [Member]
Expected Risk Free Interest Rate	4.20%	4.52%	2.80%
Expected Volatility	73.50%	84.56%	90.90%
Expected Dividend Yield	0.00%	0.00%	0.00%
Expected Life in Years (Year)	3 years	3 years	3 years
Correlation	83.80%	81.22%	76.89%
Exercise Price in U.S. dollars (in dollars per share)	$ 5.49	$ 3.32	$ 3.98
Granted, weighted average grant date fair value (in dollars per share)	$ 5.41	$ 3.35	$ 4.8