Note 12 - Lease Liabilities - Lease Expenses (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Operating Leases	$ 63,606	$ 52,372	$ 121,203	$ 106,833
Short-term Leases	189,204	20,313	527,625	42,955
Total Lease Expenses	$ 252,810	$ 72,685	$ 648,828	$ 149,788