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Note 5 - Loans and Leases - Change in Allowance (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Beginning balance | $ 18,806 | $ 17,149 | $ 17,149
Charge-offs | (226) | (303) |
Recoveries | 181 | 140 |
Provision for credit losses on loans | 125 | 180 |
Ending balance | 18,886 | 17,910 | 18,806
Initial allowance on loans purchased with credit deterioration |  | 126 |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Beginning balance |  | 618 | 618
Commercial Portfolio Segment [Member] |  |  |
Beginning balance | 1,850 | 2,924 | 2,924
Charge-offs | (114) | (170) |
Recoveries | 2 | 20 |
Provision for credit losses on loans | 166 | (502) |
Ending balance | 1,904 | 2,550 | 1,850
Initial allowance on loans purchased with credit deterioration |  | 0 |
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Beginning balance |  | 278 | 278
Commercial Real Estate Portfolio Segment [Member] |  |  |
Beginning balance | 8,835 | 7,162 | 7,162
Charge-offs | (5) | (32) |
Recoveries | 155 | 39 |
Provision for credit losses on loans | (161) | 106 |
Ending balance | 8,824 | 8,157 | 8,835
Initial allowance on loans purchased with credit deterioration |  | 126 |
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Beginning balance |  | 756 | 756
Consumer Portfolio Segment [Member] |  |  |
Beginning balance | 2,391 | 2,827 | 2,827
Charge-offs | (107) | (101) |
Recoveries | 22 | 72 |
Provision for credit losses on loans | (43) | 197 |
Ending balance | 2,263 | 2,448 | 2,391
Initial allowance on loans purchased with credit deterioration |  | 0 |
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Beginning balance |  | (547) | (547)
Residential Portfolio Segment [Member] |  |  |
Beginning balance | 5,694 | 4,169 | 4,169
Charge-offs | 0 | 0 |
Recoveries | 2 | 9 |
Provision for credit losses on loans | 150 | 307 |
Ending balance | 5,846 | 4,683 | 5,694
Initial allowance on loans purchased with credit deterioration |  | 0 |
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Beginning balance |  | 198 | 198
Unallocated Financing Receivables [Member] |  |  |
Beginning balance | 36 | 67 | 67
Charge-offs | 0 | 0 |
Recoveries | 0 | 0 |
Provision for credit losses on loans | 13 | 72 |
Ending balance | $ 49 | 72 | 36
Initial allowance on loans purchased with credit deterioration |  | 0 |
Unallocated Financing Receivables [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Beginning balance |  | $ (67) | $ (67)

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