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Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details Textual) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Ratio of Allowance for Loan Losses to End of Period Loans, Excluding PPP Loans | 1.16% |  |
Mortgage Loans in Process of Foreclosure, Amount | $ 261 |  |
Interest and Fee Income, Loans and Leases, Total | $ 34,523 | $ 33,869 | $ 31,333
Threshold Period for Considering Loans as Special Mention or Classified (Day) | 75 days |  |
Financing Receivable, Modifications, Number of Contracts | 0 | 1 | 13
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | 0 |  |
Number of Loan Modifications for COVID-19 Related Accommodations | 388 |  |
Principal Balance of Loans with COVID-19 Related Accommodations | $ 182,829 |  |
Financing Receivable, Number of Principal and Interest Payment Deferrals | 75 |  |
Financing Receivable, Principal and Interest Deferred Payments | $ 43,576 |  |
Financing Receivable, Number Deferrals in Modification | 15 |  |
Financing Receivable, Deferred Payments in Modification | $ 38,935 |  |
Special Mention [Member] |  |  |
Increase in Percentage of Allocation Loans Rated Special Mention | 50.00% |  |
Classified Excluding Impaired [Member] |  |  |
Increase in Percentage of Allocation Loans Rated Classified | 100.00% |  |
Nonperforming Financial Instruments [Member] |  |  |
Interest and Fee Income, Loans and Leases, Total | $ 0 | $ 0 | $ 0
Residential Portfolio Segment [Member] |  |  |
Other Real Estate, Ending Balance | $ 110 |  |
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts |  | 7 |
Financing Receivable, Troubled Debt Restructuring |  | $ 263 |
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Number of Principal and Interest Payment Deferrals | 17 |  |
Financing Receivable, Principal and Interest Deferred Payments | $ 39,402 |  |

X
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- Definition The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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