Note 11 - Capital Stock - Warrants Outstanding and Exercisable (Details) - $ / shares	6 Months Ended
	Jan. 31, 2024	Jul. 31, 2023
Weighted Average Exercise Price (in dollars per share)	$ 3.38	$ 3.31
Number of Warrants Outstanding (in shares)	3,554,810	3,857,030
Weighted Average Remaining Contractual Life (Year)	8 months 4 days
Warrants 1 [Member]
Weighted Average Exercise Price (in dollars per share)	$ 3.34
Number of Warrants Outstanding (in shares)	3,372,992
Weighted Average Remaining Contractual Life (Year)	7 months 6 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)	2 years 2 months 4 days
Expiry Date	Apr. 05, 2026