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Note 12 - 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] |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average of Remaining Contractual Life (in years) |  |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2022 |  |  | 802,163 |  |  | $ | 12.23 |  |  |  |  |  |  |  |  |
Issued |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (6,418 | ) |  | $ | 9.22 |  |  |  |  |  |  |  |  |
Expired/Forfeited |  |  | (999 | ) |  | $ | 15.30 |  |  |  |  |  |  |  |  |
Outstanding at June 30, 2023 |  |  | 794,746 |  |  | $ | 12.25 |  |  |  | 1.1 |  |  | $ | 23,654,540 |
Exercisable at June 30, 2023 |  |  | 685,050 |  |  | $ | 9.31 |  |  |  | 0.8 |  |  | $ | 22,402,009 |

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