Note 15 - Capital Stock - Warrants Outstanding and Exercisable (Details) - $ / shares	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2021
Warrants, exercise price (in dollars per share)	$ 4.13	$ 3.29	$ 3.31	$ 1.92
Warrants, outstanding (in shares)	159,091	1,265,319	3,857,030	3,615,454
Warrants 1 [Member]
Warrants, exercise price (in dollars per share)	$ 4.13
Warrants, outstanding (in shares)	159,091
Warrants, remaining contractual life (Year)	8 months 4 days