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Note 9 - Stockholders' Equity and Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Schedule of Nonvested Share Activity [Table Text Block] |
​ |  | ​ |  |  | Weighted |
​ |  | ​ |  |  | Average Grant |
​ |  | ​ |  |  | Date |
​ |  | Shares |  |  | Fair Value |
Nonvested shares at January 1, 2023 |  |  | 121,059 |  |  | $ | 24.83 |
Granted in 2023 |  |  | 132,526 |  |  |  | 44.99 |
Vested in 2023 |  |  | (110,291 | ) |  |  | 33.92 |
Forfeited in 2023 |  |  | — |  |  |  | — |
Nonvested shares at December 31, 2023 |  |  | 143,294 |  |  | $ | 36.48 |
Granted in 2024 |  |  | 51,812 |  |  |  | 58.83 |
Vested in 2024 |  |  | (78,397 | ) |  |  | 35.28 |
Forfeited in 2024 |  |  | (1,999 | ) |  |  | 45.33 |
Nonvested shares at December 31, 2024 |  |  | 114,710 |  |  | $ | 47.23 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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