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Note 2 - Recent Accounting Pronouncements (Details Textual) - USD ($) | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Jan. 01, 2023 | Dec. 31, 2022
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Financing Receivable, Allowance for Credit Loss | $ 11,479,000 | $ 11,121,000 | $ 10,896,000 | $ 9,738,000 | $ 9,411,000 |  | $ 9,468,000
Off-Balance-Sheet, Credit Loss, Liability | 487,000 | 531,000 | 609,000 | $ 588,000 | 671,000 |  | 546,000
Retained Earnings (Accumulated Deficit) | $ 169,494,000 |  | 154,301,000 |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  |  |  |  |  | 346,000
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  |  |  |  | $ 346,000 |
Off-Balance-Sheet, Credit Loss, Liability |  | $ 0 | $ 0 |  | $ 0 | 547,000 | $ 547,000
Retained Earnings (Accumulated Deficit) |  |  |  |  |  | (629,000) |
Deferred Tax Assets, Net of Valuation Allowance |  |  |  |  |  | $ 264,000 |

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