Note 11 - Capital Stock - Warrants Outstanding and Exercisable (Details) - $ / shares	3 Months Ended
	Oct. 31, 2023	Jul. 31, 2023
Balance, Weighted Average Exercise Price (in dollars per share)	$ 3.31	$ 3.31
Balance, Number of Warrants (in shares)	3,857,030	3,857,030
Weighted Average Remaining Contractual Life (Year)	11 months 4 days
Warrants 1 [Member]
Balance, Weighted Average Exercise Price (in dollars per share)	$ 3.27
Balance, Number of Warrants (in shares)	3,675,212
Weighted Average Remaining Contractual Life (Year)	10 months 6 days
Expiry Date	Sep. 07, 2024
Warrants 2 [Member]
Balance, Weighted Average Exercise Price (in dollars per share)	$ 4.13
Balance, Number of Warrants (in shares)	181,818
Weighted Average Remaining Contractual Life (Year)	2 years 5 months 4 days
Expiry Date	Apr. 05, 2026