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Note 5 - Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | 2024 |  |  | 2023 |
Customer relationships |  | $ | 461,997 |  |  | $ | 489,273 |
Patent cost |  |  | 173,624 |  |  |  | 183,874 |
|  |  | 635,621 |  |  |  | 673,147 |
Less accumulated amortization |  |  | (596,254 | ) |  |  | (558,554 | )
Intangible assets, net |  | $ | 39,367 |  |  | $ | 114,593 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | Amortization |
Year ending December 31, |  | Expenses |
2025 |  |  | 7,238 |
2026 |  |  | 7,238 |
2027 |  |  | 7,238 |
2028 |  |  | 7,238 |
2029 |  |  | 7,238 |
Thereafter |  |  | 3,177 |
|  | $ | 39,367 |

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