Note 15 - Derivative Liabilities (Details Textual) - USD ($) $ in Thousands	2 Months Ended	12 Months Ended
	Sep. 26, 2024	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Class of Warrant or Right Exercised (in shares)		(2,591,711)	4,359,086	1,771,869
Proceeds from Warrant Exercises		$ 8,119	$ 7,554	$ 3,589
Class of Warrant or Right, Expired (in shares)			59,918
Subsequent Event [Member] | Replacement Warrants [Member]
Class of Warrant or Right Exercised (in shares)	1,043,172
Proceeds from Warrant Exercises	$ 3,387
Class of Warrant or Right, Expired (in shares)	40,329