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Note 13 - Share Incentive Plans (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |  |  | Weighted |
|  | Stock |  |  | Average |  |  | Average |
|  | Option |  |  | Exercise |  |  | Grant Date |
|  | Shares |  |  | Price |  |  | Fair Value |
Outstanding, December 31, 2023 |  |  | 656,951 |  |  | $ | 29.79 |  |  | $ | 9.18 |
Granted |  |  | 54,289 |  |  |  | 27.19 |  |  |  | 9.21 |
Exercised |  |  | (132,572 | ) |  |  | 21.36 |  |  |  | 6.97 |
Forfeited |  |  | (42,878 | ) |  |  | 38.11 |  |  |  | 11.94 |
Outstanding, December 31, 2024 |  |  | 535,790 |  |  | $ | 30.69 |  |  | $ | 9.51 |
Exercised |  |  | (155,965 | ) |  |  | 31.56 |  |  |  | 9.69 |
Forfeited |  |  | (2,643 | ) |  |  | 36.11 |  |  |  | 10.88 |
Outstanding, June 30, 2025 |  |  | 377,182 |  |  | $ | 30.29 |  |  | $ | 9.42 |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | February 10, |  |  | May 17, |  |  | March 7, |  |  | March 20, |  |  | March 18, |  |  | February 18, |
|  | 2017 |  |  | 2017 |  |  | 2018 |  |  | 2019 |  |  | 2020 |  |  | 2021 |
Number of options granted |  |  | 40,000 |  |  |  | 93,819 |  |  |  | 98,100 |  |  |  | 155,780 |  |  |  | 155,000 |  |  |  | 100,000 |
Options outstanding at June 30, 2025 |  |  | 5,000 |  |  |  | 23,969 |  |  |  | 36,367 |  |  |  | 74,440 |  |  |  | 37,513 |  |  |  | 43,500 |
Number exercisable at June 30, 2025 |  |  | 5,000 |  |  |  | 23,969 |  |  |  | 36,367 |  |  |  | 74,440 |  |  |  | 37,513 |  |  |  | 43,500 |
Exercise price |  | $ | 13.00 |  |  | $ | 15.41 |  |  | $ | 21.21 |  |  | $ | 47.58 |  |  | $ | 14.85 |  |  | $ | 51.75 |
Remaining lives |  |  | 1.62 |  |  |  | 1.88 |  |  |  | 2.69 |  |  |  | 3.72 |  |  |  | 4.72 |  |  |  | 5.64 |
Risk free interest rate |  |  | 1.89 | % |  |  | 1.76 | % |  |  | 2.65 | % |  |  | 2.34 | % |  |  | 0.79 | % |  |  | 0.56 | %
Expected volatility |  |  | 27.44 | % |  |  | 26.92 | % |  |  | 28.76 | % |  |  | 30.95 | % |  |  | 35.72 | % |  |  | 28.69 | %
Expected life |  |  | 6.000 |  |  |  | 6.000 |  |  |  | 6.000 |  |  |  | 6.000 |  |  |  | 6.000 |  |  |  | 6.000 |
Dividend yield |  |  | - |  |  |  | - |  |  |  | 0.83 | % |  |  | 0.42 | % |  |  | 1.49 | % |  |  | 0.55 | %
Fair value at grant date |  | $ | 3.98 |  |  | $ | 4.60 |  |  | $ | 6.37 |  |  | $ | 15.63 |  |  | $ | 4.41 |  |  | $ | 13.77 |
|  | May 17, |  |  | March 14, |  |  | April 29, |  |  | May 12, |  |  | March 11, |
|  | 2021 |  |  | 2022 |  |  | 2022 |  |  | 2023 |  |  | 2024 |
Number of options granted |  |  | 7,500 |  |  |  | 100,000 |  |  |  | 14,827 |  |  |  | 77,519 |  |  |  | 54,289 |
Options outstanding at June 30, 2025 |  |  | 2,200 |  |  |  | 16,112 |  |  |  | 6,273 |  |  |  | 77,519 |  |  |  | 54,289 |
Number exercisable at June 30, 2025 |  |  | 2,200 |  |  |  | 16,112 |  |  |  | 6,273 |  |  |  | 77,519 |  |  |  | 54,289 |
Exercise price |  | $ | 45.05 |  |  | $ | 30.46 |  |  | $ | 31.39 |  |  | $ | 20.71 |  |  | $ | 27.19 |
Remaining lives |  |  | 5.88 |  |  |  | 6.71 |  |  |  | 6.83 |  |  |  | 7.87 |  |  |  | 8.70 |
Risk free interest rate |  |  | 0.84 | % |  |  | 2.10 | % |  |  | 2.92 | % |  |  | 3.41 | % |  |  | 4.06 | %
Expected volatility |  |  | 31.50 | % |  |  | 35.33 | % |  |  | 35.33 | % |  |  | 34.51 | % |  |  | 35.09 | %
Expected life |  |  | 6.000 |  |  |  | 6.000 |  |  |  | 6.000 |  |  |  | 5.186 |  |  |  | 5.186 |
Dividend yield |  |  | 0.63 | % |  |  | 1.01 | % |  |  | 0.98 | % |  |  | 1.61 | % |  |  | 1.26 | %
Fair value at grant date |  | $ | 13.23 |  |  | $ | 10.23 |  |  | $ | 11.07 |  |  | $ | 6.45 |  |  | $ | 9.21 |
Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block] |
|  | February 18, |  |  | March 14, |  |  | May 4, |  |  | March 1, |  |  | April 1, |  |  | March 3, |
|  | 2021 |  |  | 2022 |  |  | 2023 |  |  | 2024 |  |  | 2024 |  |  | 2025 |
Number of PRSUs granted |  |  | 100,000 |  |  |  | 49,996 |  |  |  | 133,578 |  |  |  | 111,321 |  |  |  | 8,242 |  |  |  | 41,137 |
PRSUs outstanding at June 30, 2025 |  |  | 65,740 |  |  |  | 20,505 |  |  |  | 68,319 |  |  |  | 75,985 |  |  |  | 6,594 |  |  |  | 41,137 |
Fair value as of grant date |  | $ | 51.75 |  |  | $ | 30.46 |  |  | $ | 22.25 |  |  | $ | 26.52 |  |  | $ | 29.12 |  |  | $ | 70.34 |
Remaining lives |  |  | 0.50 |  |  |  | 1.50 |  |  |  | 0.50 |  |  |  | 1.50 |  |  |  | 1.50 |  |  |  | 2.50 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | March 14, |  |  | April 29, |  |  | May 5, |  |  | March 1, |  |  | April 1, |  |  | March 3, |  |  | March 5, |  |  | May 8, |
|  | 2022 |  |  | 2022 |  |  | 2023 |  |  | 2024 |  |  | 2024 |  |  | 2025 |  |  | 2025 |  |  | 2025 |
Number of RSUs granted |  |  | 50,004 |  |  |  | 4,522 |  |  |  | 130,873 |  |  |  | 105,257 |  |  |  | 5,495 |  |  |  | 36,843 |  |  |  | 14,921 |  |  |  | 8,464 |
RSUs outstanding at June 30, 2025 |  |  | 20,451 |  |  |  | 1,263 |  |  |  | 33,844 |  |  |  | 56,175 |  |  |  | 3,627 |  |  |  | 36,843 |  |  |  | 14,921 |  |  |  | 8,464 |
Fair value as of grant date |  | $ | 30.46 |  |  | $ | 31.39 |  |  | $ | 22.25 |  |  | $ | 26.52 |  |  | $ | 29.12 |  |  | $ | 70.34 |  |  | $ | 67.02 |  |  | $ | 75.66 |
Remaining lives |  |  | 1.50 |  |  |  | 1.50 |  |  |  | 0.75 |  |  |  | 1.75 |  |  |  | 1.75 |  |  |  | 2.75 |  |  |  | 0.75 |  |  |  | 1.00 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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