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Note 6 - Investment and Equity Securities (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
|  | September 30, 2025 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost (a) |  |  | Gains |  |  | Losses |  |  | Value |
Subordinated debt |  | $ | 24,500 |  |  | $ | 85 |  |  | $ | (1,013 | ) |  | $ | 23,572 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 146,851 |  |  |  | 21 |  |  |  | (22,499 | ) |  |  | 124,373 |
Mortgage-backed securities in government-sponsored entities |  |  | 8,396 |  |  |  | 46 |  |  |  | (532 | ) |  |  | 7,910 |
Total |  | $ | 179,747 |  |  | $ | 152 |  |  | $ | (24,044 | ) |  | $ | 155,855 |
|  | December 31, 2024 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost (a) |  |  | Gains |  |  | Losses |  |  | Value |
Subordinated debt |  | $ | 34,300 |  |  | $ | 67 |  |  | $ | (1,898 | ) |  | $ | 32,469 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 147,767 |  |  |  | 4 |  |  |  | (22,805 | ) |  |  | 124,966 |
Mortgage-backed securities in government-sponsored entities |  |  | 9,144 |  |  |  | 1 |  |  |  | (778 | ) |  |  | 8,367 |
Total |  | $ | 191,211 |  |  | $ | 72 |  |  | $ | (25,481 | ) |  | $ | 165,802 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 70 |  |  | $ | 70 |
Due after one year through five years |  |  | 8,051 |  |  |  | 7,887 |
Due after five years through ten years |  |  | 47,775 |  |  |  | 46,255 |
Due after ten years |  |  | 123,851 |  |  |  | 101,643 |
Total |  | $ | 179,747 |  |  | $ | 155,855 |
Gain (Loss) on Securities [Table Text Block] |
|  | September 30, 2025 |
|  | Less than Twelve Months |  |  | Twelve Months or Greater |  |  | Total |
|  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollar amounts in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Subordinated debt |  | $ | 727 |  |  | $ | (23 | ) |  | $ | 19,761 |  |  | $ | (989 | ) |  | $ | 20,487 |  |  | $ | (1,013 | )
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | - |  |  |  | - |  |  |  | 111,984 |  |  |  | (22,499 | ) |  |  | 111,984 |  |  |  | (22,499 | )
Mortgage-backed securities in government-sponsored entities |  |  | 1,026 |  |  |  | (3 | ) |  |  | 5,093 |  |  |  | (529 | ) |  |  | 6,119 |  |  |  | (532 | )
Total |  | $ | 1,753 |  |  | $ | (26 | ) |  | $ | 136,838 |  |  | $ | (24,017 | ) |  | $ | 138,590 |  |  | $ | (24,044 | )
|  | December 31, 2024 |
|  | Less than Twelve Months |  |  | Twelve Months or Greater |  |  | Total |
|  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(Dollar amounts in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
Subordinated debt |  | $ | 10,632 |  |  | $ | (368 | ) |  | $ | 20,770 |  |  | $ | (1,530 | ) |  | $ | 31,402 |  |  | $ | (1,898 | )
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 15,456 |  |  |  | (487 | ) |  |  | 102,484 |  |  |  | (22,318 | ) |  |  | 117,940 |  |  |  | (22,805 | )
Mortgage-backed securities in government-sponsored entities |  |  | 1,986 |  |  |  | (49 | ) |  |  | 5,118 |  |  |  | (729 | ) |  |  | 7,104 |  |  |  | (778 | )
Total |  | $ | 28,074 |  |  | $ | (904 | ) |  | $ | 128,372 |  |  | $ | (24,577 | ) |  | $ | 156,446 |  |  | $ | (25,481 | )

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