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Note 3 - Bank Note Payable (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2020
Proceeds from Issuance of Long-term Debt, Total |  | $ 0 |  | $ 890,000
Gain (Loss) on Extinguishment of Debt, Total |  | $ (0) |  | $ 896,000
Paycheck Protection Program CARES Act [Member] |  |  |  |
Proceeds from Issuance of Long-term Debt, Total | $ 889,858 |  |  |
Paycheck Protection Program CARES Act [Member] | Other Income [Member] |  |  |  |
Gain (Loss) on Extinguishment of Debt, Total |  |  | $ 896,000 |

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