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Note 10 - Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Shares |  |  | Weighted- Average Exercise Price Per Share |  |  | Weighted- Average Remaining Contractual Term (in years) |  |  | Aggregate Intrinsic Value |
Outstanding – January 1, 2021 |  |  | 362,640 |  |  | $ | 3.96 |  |  |  |  |  |  |  |  |
Granted |  |  | 49,000 |  |  |  | 8.50 |  |  |  |  |  |  |  |  |
Exercised |  |  | (13,400 | ) |  |  | 3.43 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (10,740 | ) |  |  | 3.42 |  |  |  |  |  |  |  |  |
Outstanding – December 31, 2021 |  |  | 387,500 |  |  | $ | 4.57 |  |  |  | 7.17 |  |  | $ | 1,225 |
Granted |  |  | 94,000 |  |  |  | 11.18 |  |  |  |  |  |  |  |  |
Exercised |  |  | (19,800 | ) |  |  | 3.40 |  |  |  |  |  |  |  |  |
Cancelled |  |  | (9,000 | ) |  |  | 4.19 |  |  |  |  |  |  |  |  |
Outstanding – December 31, 2022 |  |  | 452,700 |  |  | $ | 5.97 |  |  |  | 6.87 |  |  | $ | 2,855 |
Exercisable on December 31, 2022 |  |  | 223,300 |  |  | $ | 4.11 |  |  |  | 5.76 |  |  | $ | 1,817 |

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