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Note 7 - Stock Option Plans (Tables) | 3 Months Ended
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Mar. 31, 2025
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of Options |  |  | Weighted Averaged Exercise Price $ |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Options Value $ |
Options outstanding at January 1, 2025 |  |  | 2,951,989 |  |  |  | 2.29 |  |  |  | 4.54 |  |  |  | - |
Granted during 2025 |  |  | - |  |  |  | - |  |  |  |  |  |  |  | - |
Exercised during 2025 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired during 2025 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Options outstanding March 31, 2025 |  |  | 2,951,989 |  |  |  | 2.33 |  |  |  | 4.29 |  |  |  | - |
Exercisable, March 31, 2025 |  |  | 2,103,433 |  |  |  | 2.29 |  |  |  | 3.72 |  |  |  | - |
|  | Number of Options |  |  | Weighted Averaged Exercise Price $ |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Options Value $ |
Options outstanding at January 1, 2025 |  |  | 99,996 |  |  |  | 1.74 |  |  |  | 2.12 |  |  |  | 5,750 |
Granted during 2025 |  |  | 16,666 |  |  |  | 0.94 |  |  |  | 4.94 |  |  |  |  |
Exercised during 2025 |  |  | - |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited or expired during 2025 |  |  | (8,333 | ) |  |  | 1.65 |  |  |  |  |  |  |  |  |
Options outstanding March 31, 2025 |  |  | 108,329 |  |  |  | 1.62 |  |  |  | 2.49 |  |  |  | 4,750 |
Exercisable, March 31, 2025 |  |  | 83,326 |  |  |  | 1.83 |  |  |  | 1.87 |  |  |  | 3,722 |
Restricted Stock [Member] |
Notes Tables |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Grant-Date Fair Value per Award |
Non-vested as January 1, 2025 |  |  | 365,171 |  |  |  | 0.89 |
Granted |  |  | - |  |  |  | - |
Vested |  |  | (182,584 | ) |  |  | 0.89 |
Cancelled |  |  | (28,090 | ) |  |  | 0.89 |
Non-vested as March 31, 2025 |  |  | 154,497 |  |  |  | 0.89 |

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