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Note 7 - Long-term Debt - Notes Payable (Details) - Senior Promissory Notes [Member] - USD ($)
Sep. 30, 2022
Jun. 22, 2022
Dec. 31, 2021
Senior Promissory Notes $ 6,000,000 $ 6,000,000.0 $ 0
Less: unamortized debt discount (604,760) $ (664,704) 0
Senior Promissory Notes payable 5,395,240   0
Current portion of Senior Promissory Notes payable 0   0
Senior Promissory Notes payable, less current portion $ 5,395,240   $ 0