Note 18 - Sales and Service Revenue and Cost of Sales and Services - Sales and Service Revenue and Cost of Sales and Service Renue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
SALES AND SERVICE REVENUE	$ 164,389	$ 23,161	$ 0
COST OF SALES AND SERVICES	(114,719)	(15,868)	0
Sale of Inventory [Member]
SALES AND SERVICE REVENUE	163,950	22,946	0
COST OF SALES AND SERVICES	(114,353)	(15,689)	0
Toll Processing Services [Member]
SALES AND SERVICE REVENUE	439	215	0
COST OF SALES AND SERVICES	$ (366)	$ (179)	$ 0