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Note 16 - Stock Option Plan (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | March 2023 |  |  | December 2022 |  |  | May 2022 |  |  | July 2021 |  |  | January 2021 |
Expected volatility |  |  | 28.4 | % |  |  | 28.9 | % |  |  | 29.5 | % |  |  | 31.6 | % |  |  | 30.8 | %
Expected term (years) |  |  | 8.0 |  |  |  | 8.0 |  |  |  | 6.0 |  |  |  | 6.0 |  |  |  | 6.0 |
Expected dividends |  |  | 2.92 | % |  |  | 2.55 | % |  |  | 2.52 | % |  |  | 1.98 | % |  |  | 1.86 | %
Risk free rate |  |  | 4.27 | % |  |  | 4.00 | % |  |  | 2.71 | % |  |  | 0.48 | % |  |  | 0.26 | %
Grant date fair value |  | $ | 5.49 |  |  | $ | 6.16 |  |  | $ | 5.28 |  |  | $ | 5.69 |  |  | $ | 4.14 |
Share-Based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted- |  |  |  |  |
|  |  |  |  |  | Weighted- |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  |  |  |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |
(dollars in thousands, except for shares and per share data) |  | Shares |  |  | Price |  |  | Term in years |  |  | Value |
Outstanding at beginning of year |  |  | 454,610 |  |  | $ | 16.97 |  |  |  |  |  |  |  |  |
Granted |  |  | 30,000 |  |  |  | 19.87 |  |  |  |  |  |  |  |  |
Exercised |  |  | (19,403 | ) |  |  | 15.18 |  |  |  |  |  |  |  |  |
Forfeited/cancelled |  |  | (67,304 | ) |  |  | 15.04 |  |  |  |  |  |  |  |  |
Outstanding at end of period |  |  | 397,903 |  |  | $ | 17.61 |  |  |  | 3.86 |  |  | $ | 703 |
Options exercisable |  |  | 332,232 |  |  | $ | 17.26 |  |  |  | 3.05 |  |  | $ | 657 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  |  |  |  |  | Weighted-Average |
|  |  |  |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Outstanding at beginning of year |  |  | 14,786 |  |  | $ | 27.16 |
Granted |  |  | 48,748 |  |  |  | 18.25 |
Vested |  |  | (20,374 | ) |  |  | 23.35 |
Outstanding at end of period |  |  | 43,160 |  |  | $ | 18.89 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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