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v3.23.1

Note 6 - Long-term Debt - Notes Payable (Details) - Senior Promissory Notes [Member] - USD ($) | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 22, 2022
--- | --- | --- | ---
Senior Promissory Notes | $ 6,000,000 | $ 6,000,000 | $ 6,000,000.0
Less: unamortized debt discount | (435,158) | (519,686) | $ (695,749)
Senior Promissory Notes payable | 5,564,842 | 5,480,314 |
Current portion of Senior Promissory Notes payable | 0 | 0 |
Senior Promissory Notes payable, less current portion | $ 5,564,842 | $ 5,480,314 |

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