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 ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
SALES AND SERVICE REVENUE	$ 9,892,310	$ 0	$ 23,083,235	$ 0
COST OF SALES AND SERVICES	(6,554,754)	0	(15,802,962)	0
Sale of Inventory [Member]
SALES AND SERVICE REVENUE	9,800,000	0	22,946,000	0
COST OF SALES AND SERVICES	(6,477,830)	0	(15,688,600)	0
Toll Processing Services [Member]
SALES AND SERVICE REVENUE	92,310	0	137,235	0
COST OF SALES AND SERVICES	$ (76,924)	$ 0	$ (114,362)	$ 0