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Note 6 - Loans (Details Textual) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Mar. 20, 2021 | Apr. 14, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Repayments of Long-term Debt, Total |  |  | $ 39,802 | $ (0)
Paycheck Protection Program CARES Act [Member] |  |  |  |
Proceeds from Issuance of Long-term Debt, Total |  | $ 813,500 |  |
Debit Arrangement to Finance Purchase of Output Solutions Sorter [Member] |  |  |  |
Debt Instrument, Face Amount | $ 165,996 |  |  |
Debt Instrument, Term (Month) | 36 months |  |  |
Debt Instrument, Periodic Payment, Total | $ 4,902 |  |  |
Debt Instrument, Annual Periodic Payment | $ 58,821 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.95% |  |  |
Repayments of Long-term Debt, Total |  |  | $ 26,446 |

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