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Note 7 - Stock-based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Stock Options |  |  | Grant Date Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Life (in Years) |  |  | Intrinsic Value |
Outstanding at January 1, 2023 |  |  | 95,000 |  |  | $ | 2.76 |  |  |  | 4.83 |  |  | $ | 25,000 |
Granted |  |  | 70,000 |  |  | $ | 2.82 |  |  |  | 7.00 |  |  | $ | - |
Forfeited |  |  | (19,000 | ) |  | $ | 2.69 |  |  |  | - |  |  | $ | - |
Outstanding at June 30, 2023 |  |  | 146,000 |  |  | $ | 2.80 |  |  |  | 5.76 |  |  | $ | - |
Exercisable at June 30, 2023 |  |  | 20,000 |  |  | $ | 2.92 |  |  |  | 2.67 |  |  | $ | - |
Outstanding at January 1, 2022 |  |  | 67,000 |  |  | $ | 2.72 |  |  |  | 3.33 |  |  | $ | - |
Exercised |  |  | (2,000 | ) |  | $ | 2.70 |  |  |  | - |  |  | $ | - |
Forfeited |  |  | (7,000 | ) |  | $ | 2.58 |  |  |  | - |  |  | $ | - |
Outstanding at June 30, 2022 |  |  | 58,000 |  |  | $ | 2.74 |  |  |  | 3.29 |  |  | $ | 3,000 |
Exercisable at June 30, 2022 |  |  | 50,000 |  |  | $ | 2.74 |  |  |  | 2.99 |  |  | $ | - |

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