Note 5 - Loans and Related Allowance for Loan and Lease Losses (Details Textual) - USD ($) |
12 Months Ended | |
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Dec. 31, 2022 |
Dec. 31, 2021 |
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| Loans and Leases Receivable, Deferred Income | $ 2,000,000.0 | $ 3,600,000 |
| Financing Receivable, Troubled Debt Restructuring | 3,300,000 | 2,600,000 |
| Financing Receivable, Allowance for Credit Loss, Writeoff | 72,000 | 150,000 |
| Financing Receivable, 90 Days or More Past Due, Still Accruing | 0 | 0 |
| Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | 125,000 | 204,000 |
| Threshold For Loans Evaluated For Impairment [Member] | ||
| Loans and Leases Receivable, before Fees, Gross | 750,000 | |
| Financial Asset Acquired with Credit Deterioration [Member] | Liberty Bancshares Inc [Member] | ||
| Financing Receivable, after Allowance for Credit Loss, Total | 8,000,000.0 | |
| Notes Receivable, Fair Value Disclosure | 6,100,000 | |
| Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member] | ||
| Loans and Leases Receivable, Deferred Income | $ 1,000 | $ 1,300,000 |
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- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of financing receivable modified as troubled debt restructuring. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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