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Note 4 - Investment and Equity Securities (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] |
|  | December 31, 2022 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Subordinated debt |  | $ | 32,300 |  |  | $ | 3 |  |  | $ | (2,139 | ) |  | $ | 30,164 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  |  | 500 |  |  |  | - |  |  |  | - |  |  |  | 500 |
Tax-exempt |  |  | 151,896 |  |  |  | 49 |  |  |  | (25,111 | ) |  |  | 126,834 |
Mortgage-backed securities in government-sponsored entities |  |  | 8,302 |  |  |  | - |  |  |  | (833 | ) |  |  | 7,469 |
Total |  | $ | 192,998 |  |  | $ | 52 |  |  | $ | (28,083 | ) |  | $ | 164,967 |
|  | December 31, 2021 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Subordinated debt |  | $ | 32,300 |  |  | $ | 356 |  |  | $ | (119 | ) |  | $ | 32,537 |
Obligations of states and political subdivisions: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Taxable |  |  | 500 |  |  |  | 2 |  |  |  | - |  |  |  | 502 |
Tax-exempt |  |  | 122,877 |  |  |  | 4,307 |  |  |  | (341 | ) |  |  | 126,843 |
Mortgage-backed securities in government-sponsored entities |  |  | 10,140 |  |  |  | 257 |  |  |  | (80 | ) |  |  | 10,317 |
Total |  | $ | 165,817 |  |  | $ | 4,922 |  |  | $ | (540 | ) |  | $ | 170,199 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Amortized |  |  | Fair |
(Dollar amounts in thousands) |  | Cost |  |  | Value |
Due in one year or less |  | $ | 1,125 |  |  | $ | 1,126 |
Due after one year through five years |  |  | 3,004 |  |  |  | 2,904 |
Due after five years through ten years |  |  | 45,363 |  |  |  | 42,881 |
Due after ten years |  |  | 143,506 |  |  |  | 118,056 |
Total |  | $ | 192,998 |  |  | $ | 164,967 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | December 31, 2022 |
|  | 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 |  | $ | 12,638 |  |  | $ | (1,129 | ) |  | $ | 8,790 |  |  | $ | (1,010 | ) |  | $ | 21,428 |  |  | $ | (2,139 | )
Obligations of states and political subdivisions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 75,343 |  |  |  | (10,488 | ) |  |  | 41,138 |  |  |  | (14,623 | ) |  |  | 116,481 |  |  |  | (25,111 | )
Mortgage-backed securities in government-sponsored entities |  |  | 6,153 |  |  |  | (480 | ) |  |  | 1,316 |  |  |  | (353 | ) |  |  | 7,469 |  |  |  | (833 | )
Total |  | $ | 94,134 |  |  | $ | (12,097 | ) |  | $ | 51,244 |  |  | $ | (15,986 | ) |  | $ | 145,378 |  |  | $ | (28,083 | )
|  | December 31, 2021 |
|  | 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 |  | $ | 9,150 |  |  | $ | (100 | ) |  | $ | 731 |  |  | $ | (19 | ) |  | $ | 9,881 |  |  | $ | (119 | )
Obligations of states and political subdivisions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax-exempt |  |  | 24,273 |  |  |  | (341 | ) |  |  | - |  |  |  | - |  |  |  | 24,273 |  |  |  | (341 | )
Mortgage-backed securities in government-sponsored entities |  |  | - |  |  |  | - |  |  |  | 1,980 |  |  |  | (80 | ) |  |  | 1,980 |  |  |  | (80 | )
Total |  | $ | 33,423 |  |  | $ | (441 | ) |  | $ | 2,711 |  |  | $ | (99 | ) |  | $ | 36,134 |  |  | $ | (540 | )

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