Note 14 - Derivative Liabilities (Details Textual) - shares	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2021
Class of Warrant or Right, Outstanding (in shares)	159,091	1,265,319	3,857,030	3,615,454
Replacement Warrants [Member]
Class of Warrant or Right, Outstanding (in shares)	0