Note 16 - Capital Stock - Warrants Outstanding and Exercisable (Details) - $ / shares	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Exercise Price (in dollars per share)	$ 3.29	$ 3.31	$ 1.92	$ 1.9
$ (in shares)	1,265,319	3,857,030	3,615,454	5,387,323
Warrants 1 [Member]
Exercise Price (in dollars per share)	$ 3.16
$ (in shares)	1,083,501
$ (Year)	1 month 6 days
Warrants 2 [Member]
Exercise Price (in dollars per share)	$ 4.13
$ (in shares)	181,818
$ (Year)	1 year 8 months 4 days
Warrants 3 [Member]
Exercise Price (in dollars per share)	$ 3.29
$ (in shares)	1,265,319
$ (Year)	3 months 29 days