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		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
SALES AND SERVICE REVENUE	$ 13,190,925	$ 0	$ 13,190,925	$ 0
COST OF SALES AND SERVICES	(9,248,208)	0	$ (9,248,208)	$ 0
Sale of Inventory [Member]
SALES AND SERVICE REVENUE	13,146,000	0
COST OF SALES AND SERVICES	(9,210,770)	0
Toll Processing Services [Member]
SALES AND SERVICE REVENUE	44,925	0
COST OF SALES AND SERVICES	$ (37,438)	$ 0