Note 11 - Capital Stock - Warrants Outstanding and Exercisable (Details) - $ / shares	9 Months Ended
	Apr. 30, 2024	Jul. 31, 2023
Weighted Average Exercise Price (in dollars per share)	$ 3.38	$ 3.31
Number of Warrants Outstanding (in shares)	2,404,116	3,857,030
Weighted Average Remaining Contractual Life (Year)	5 months 23 days
Warrants 1 [Member]
Weighted Average Exercise Price (in dollars per share)	$ 3.32
Number of Warrants Outstanding (in shares)	2,222,298
Weighted Average Remaining Contractual Life (Year)	4 months 9 days
Expiry Date	Sep. 07, 2024
Warrants 2 [Member]
Weighted Average Exercise Price (in dollars per share)	$ 4.13
Number of Warrants Outstanding (in shares)	181,818
Weighted Average Remaining Contractual Life (Year)	1 year 11 months 4 days
Expiry Date	Apr. 05, 2026