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Note 4 - Allowance for Loan Losses (Details Textual) Pure in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Financing Receivable, Troubled Debt Restructuring | $ 101 | $ 1,600
Financing Receivable, Modifications, Number of Contracts | 0 |
Financing Receivable Non-accrual Loans Excluded from Impaired Loan Disclosure | $ 0 | 0
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | $ 177 | $ 155
Minimum [Member] |  |
Financing Receivable, Modifications, Interest Only Payments, Period (Year) | 6 years |
Maximum [Member] |  |
Financing Receivable, Modifications, Interest Only Payments, Period (Year) | 24 years |
TDR Loans [Member] |  |
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease), Total | $ 55 |
Performing Financial Instruments [Member] |  |
Financing Receivable, Troubled Debt Restructuring | $ 0 |

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- Definition Period of interest only payments on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19. + References No definition available. + Details
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- Definition The carrying value of non-accrual loans excluded from impaired loan disclosure. + References No definition available. + Details
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- Definition Amount of increase (decrease) in allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
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- Definition Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554 + Details
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