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Note 10 - Employee Benefits (Tables) | 12 Months Ended
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Dec. 31, 2024
Notes Tables |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2024 |  |  | 2023 |  |  | 2022 |
Expected option life in years(1) |  |  | 6.0 |  |  |  | 6.0 |  |  |  | 6.0 |
Expected stock price volatility percentage(2) |  |  | 27 | % |  |  | 28 | % |  |  | 26 | %
Risk-free interest rate percentage(3) |  |  | 4.3 | % |  |  | 4.1 | % |  |  | 2.9 | %
Expected dividend yield(4) |  |  | 1.38 | % |  |  | 1.14 | % |  |  | 1.13 | %
Fair value as of the date of grant |  | $ | 5.26 |  |  | $ | 6.63 |  |  | $ | 5.79 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Shares |  |  | Weighted- Average Exercise Price |
Outstanding at December 31, 2023 |  |  | 838,150 |  |  | $ | 16.65 |
Granted |  |  | 28,000 |  |  |  | 17.77 |
Exercised |  |  | (99,829 | ) |  |  | 13.05 |
Forfeited |  |  | (61,900 | ) |  |  | 17.26 |
Outstanding at December 31, 2024 |  |  | 704,421 |  |  | $ | 17.17 |
Exercisable at December 31, 2024 |  |  | 441,921 |  |  | $ | 16.23 |
Schedule of Nonvested Share Activity [Table Text Block] |
|  | Shares |  |  | Weighted- Average Grant Date Fair Value |  |  | Weighted- Average Remaining Contractual Life (in Years) |
Nonvested at December 31, 2023 |  |  | 406,300 |  |  | $ | 4.88 |  |  |  | 5.0 |
Granted |  |  | 28,000 |  |  |  | 5.26 |  |  |  | 6.6 |
Vested |  |  | (128,300 | ) |  |  | 4.67 |  |  |  | 3.6 |
Forfeited |  |  | (43,500 | ) |  |  | 4.57 |  |  |  | 4.2 |
Nonvested at December 31, 2024 |  |  | 262,500 |  |  | $ | 5.07 |  |  |  | 4.4 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Shares |  |  | Weighted-Average Grant Date Fair Value |
Nonvested at December 31, 2023 |  |  | 188,400 |  |  | $ | 19.51 |
Granted |  |  | 125,464 |  |  |  | 17.54 |
Vested |  |  | (49,162 | )(1) |  |  | 18.34 |
Forfeited |  |  | (9,148 | ) |  |  | 20.26 |
Nonvested at December 31, 2024 |  |  | 255,554 |  |  | $ | 18.77 |

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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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- 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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