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Note 13 - Shareholders' Equity (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2025 | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | May 31, 2013
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval |  | $ 64,247,000 |  |  |  |  |  |  | $ 64,247,000 |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) |  | $ 0.3 | $ 0.3 | $ 0.3 | $ 0.27 | $ 0.27 | $ 0.27 | $ 0.27 | $ 0.3 |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |  |  |  |  |  |  |  |  | 0 | 5,860 | 101,994 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  |  |  |  |  |  | 30,803 | 107,200 | 0 |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  |  |  |  | $ 343,000 | $ 393,000 |  |  |
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | [1] | 4.50% |  |  | 4.50% |  |  |  | 4.50% | 4.50% |  |  |
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets | [1] | 0.06 |  |  | 0.06 |  |  |  | 0.06 | 0.06 |  |  |
Capital Required for Capital Adequacy to Risk Weighted Assets | [1] | 0.08 |  |  | 0.08 |  |  |  | 0.08 | 0.08 |  |  |
Tier One Leverage Capital Required for Capital Adequacy to Average Assets | [1] | 0.04 |  |  | 0.04 |  |  |  | 0.04 | 0.04 |  |  |
Common Equity Tier One Risk Based Capital Required to Be Well Capitalized to Risk Weighted Assets |  | 6.50% |  |  | 6.50% |  |  |  | 6.50% | 6.50% |  |  |
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets |  | 0.08 |  |  | 0.08 |  |  |  | 0.08 | 0.08 |  |  |
Capital Required to be Well Capitalized to Risk Weighted Assets |  | 0.10 |  |  | 0.10 |  |  |  | 0.10 | 0.10 |  |  |
Tier One Leverage Capital Required to be Well Capitalized to Average Assets |  | 0.05 |  |  | 0.05 |  |  |  | 0.05 | 0.05 |  |  |
Capital Conservation Buffer |  | 2.50% |  |  |  |  |  |  | 2.50% |  |  |  |
Asset Threshold to Qualify for the Policy Statement after Adopted Final Amendments to the Small Bank Holding Company Policy Statment |  | $ 3,000,000,000 |  |  |  |  |  |  | $ 3,000,000,000 |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  | 0 |  |  |  |  |  |  | $ 0 |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  |  |  |  |  | 0 | 3,033 | 0 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 34.07 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  |  | 1 year |  |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  |  |  |  | $ 14,000 | $ 89,000 |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  |  |  |  | $ 0 |  |  |  |  | $ 0 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  |  |  |  |  | 0 | 435 | 0 | 1,650 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 46.04 |  | $ 31 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  |  |  |  | 1 year |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares) |  |  |  |  |  |  |  |  |  |  | 825 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) |  |  |  |  |  |  |  |  |  |  | 825 |  |
Restricted Stock [Member] | Year 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  |  |  |  |  | $ 20,000 |  |  |
Restricted Stock [Member] | Year 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 4,000 |  |
Stock Option Plan 2013 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  |  |  |  |  |  | 0 | 0 | 0 |  |
Stock Option Plan 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) |  |  |  |  |  |  |  |  |  |  |  | 576,550 |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 131,847
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  |  |  |  |  |  | 30,803 | 107,200 | 0 |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  | 774,000 |  |  |  |  |  |  | $ 774,000 |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Stock Option Plan 2013 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) |  |  |  |  |  |  |  |  |  |  |  | 126,550 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  | $ 0 |  |  |  |  |  |  | $ 0 |  |  |  |
[1] | Does not include amounts required under the capital conservation buffer discussed above.

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- Definition An additional amount held in risk-based capital designed to ensure that banks build up capital buffers outside periods of stress which can be drawn down as losses are incurred. The requirement is based on simple capital conservation rules designed to avoid breaches of minimum capital requirements. + References No definition available. + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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