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Note 4 - Loans (Details Textual) - USD ($) |  |  | 3 Months Ended | 6 Months Ended | 13 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 01, 2023 | Mar. 20, 2021 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2025 | Jun. 03, 2024 | May 29, 2024
Repayments of Long-Term Debt |  |  |  |  | $ 72,328 | $ 36,868 |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | $ 475,000
Proceeds from Lines of Credit |  |  |  |  |  |  |  | $ 0 |  |
Letter of Credit [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  | $ 474,229 |
Proceeds from Lines of Credit |  |  |  |  |  |  | $ 0 |  |  |
Debit Arrangement to Finance Purchase of Output Solutions Sorter [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 165,996 |  |  |  |  |  |  |  |
Debt Instrument, Term (Month) |  | 36 months |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.95% |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment |  | $ 4,902 |  |  |  |  |  |  |  |
Repayments of Long-Term Debt |  |  | $ 0 | $ 0 | 0 | 14,312 |  |  |  |
Debit Arrangement to Finance Purchase of Output Solutions Folder and Inserter [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 811,819 |  |  |  |  |  |  |  |  |
Debt Instrument, Term (Month) | 66 months |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.75% |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment | $ 16,017 |  |  |  |  |  |  |  |  |
Repayments of Long-term Debt and Interest |  |  | $ 47,953 | $ 36,687 | $ 95,906 | $ 50,168 |  |  |  |

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