Note 14 - 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	3 Months Ended		9 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
SALES AND SERVICE REVENUE	$ 20,217	$ 9,892	$ 125,440	$ 23,083
COST OF SALES AND SERVICES	(13,998)	(6,555)	(90,793)	(15,803)
Sale of Inventory [Member]
SALES AND SERVICE REVENUE	20,095	9,800	125,140	22,946
COST OF SALES AND SERVICES	(13,896)	(6,478)	(90,543)	(15,689)
Toll Processing Services [Member]
SALES AND SERVICE REVENUE	122	92	300	137
COST OF SALES AND SERVICES	$ (102)	$ (77)	$ (250)	$ (114)