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Note 10 - Long-term Debt - Long-term Debt (Details) - USD ($)
3 Months Ended 9 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Balance, July 31, 2021     $ 10,075,231  
Amortization of discount and accrued fees $ 0 $ 296,401 524,769 $ 1,122,096
Payment of anniversary fees     (600,000)  
Principal repayment     (10,000,000)  
Balance, April 30, 2022 $ 0   $ 0