Note 10 - Long-term Debt - Long-term Debt (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Balance, July 31, 2021			$ 10,075,231
Amortization of discount and accrued fees	$ 259,198	$ 381,828	524,769	$ 825,695
Payment of anniversary fees			(600,000)
Principal repayment			(10,000,000)
Balance, January 31, 2022	$ 0		$ 0