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Note 8 - Stock Option Plans (Tables) | 6 Months Ended
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Jun. 30, 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 |  |  | (216,296 | ) |  |  | 1.52 |  |  |  | - |  |  |  | - |
Options outstanding June 30, 2025 |  |  | 2,735,693 |  |  |  | 2.39 |  |  |  | 4.38 |  |  |  | - |
Exercisable, June 30, 2025 |  |  | 2,335,694 |  |  |  | 2.38 |  |  |  | 4.14 |  |  |  | - |
|  | 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 |  |  |  | 4.69 |  |  |  |  |
Exercised during 2025 |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Forfeited or expired during 2025 |  |  | (24,999 | ) |  |  | 1.70 |  |  |  |  |  |  |  |  |
Options outstanding June 30, 2025 |  |  | 91,663 |  |  |  | 1.60 |  |  |  | 2.68 |  |  |  | - |
Exercisable, June 30, 2025 |  |  | 66,660 |  |  |  | 1.86 |  |  |  | 2.06 |  |  |  | - |
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 |  |  | (337,081 | ) |  |  | 0.89 |
Cancelled |  |  | (28,090 | ) |  |  | 0.89 |
Non-vested as June 30, 2025 |  |  | - |  |  |  | - |

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