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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | Dec. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Loss | $ 18,768 | [1] | $ 12,897 | $ 12,897 | [1] | $ 13,343
Off-Balance-Sheet, Credit Loss, Liability | 3,441 |  | 0 | 0 |  |
Retained Earnings (Accumulated Deficit) | 129,403 |  |  | 131,661 |  |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  | 6,187 |  |  |
Off-Balance-Sheet, Credit Loss, Liability |  |  | 3,108 |  |  |
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |
Implementation Entry of Adoption of ASU |  |  | 9,300 |  |  |
Financing Receivable, Allowance for Credit Loss |  |  | 6,100 | 5,158 |  | $ 0
Off-Balance-Sheet, Credit Loss, Liability |  |  | 3,100 | 3,108 |  |
Retained Earnings (Accumulated Deficit) |  |  | (6,200) |  |  |
Deferred Tax Assets, Net of Valuation Allowance |  |  | 2,200 |  |  |
Certain Loans Acquired in Transfer, Nonaccretable Difference |  |  | $ (1,000) |  |  |
Cash Accounts [Member] |  |  |  |  |  |
Cash, Uninsured Amount | 18,700 |  |  |  |  |
Cash Held by FRB and FHLB [Member] |  |  |  |  |  |
Cash, Uninsured Amount | 56,200 |  |  |  |  |
Asset Pledged as Collateral [Member] |  |  |  |  |  |
Financial Instruments, Owned, at Fair Value | 324,100 |  |  | $ 223,700 |  |
Asset Pledged as Collateral [Member] | Derivative [Member] |  |  |  |  |  |
Financial Instruments, Owned, at Fair Value | $ 4,100 |  |  |  |  |
Premises and Equipment [Member] | Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 15 years |  |  |  |  |
Premises and Equipment [Member] | Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 39 years |  |  |  |  |
Furniture and Equipment [Member] | Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 2 years |  |  |  |  |
Furniture and Equipment [Member] | Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 10 years |  |  |  |  |
[1] | See note 3 regarding adoption of ASC 326

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