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Note 8 - Loans and Related Allowance for Loan and Lease Losses (Details Textual) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Loans and Leases Receivable, Net of Deferred Income, Total | $ 1,056,295,000 | $ 1,104,085,000 |  | $ 1,056,295,000 | $ 1,104,085,000 |  | $ 1,104,085,000
Loans and Leases Receivable, Deferred Income, Total | 5,200,000 | 4,400,000 |  | 5,200,000 | 4,400,000 |  | 4,400,000
Financing Receivable, Troubled Debt Restructuring | 2,700,000 | 2,900,000 |  | 2,700,000 | 2,900,000 |  | 2,900,000
Financing Receivable, Allowance for Credit Loss, Writeoff |  |  |  | $ 67,000 |  |  | 45,000
Number of Days Past Due (Day) |  |  |  | 90 days |  |  |
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | 124,000 | 126,000 |  | $ 183,000 | 179,000 |  |
Provision for Loan and Lease Losses, Total | $ 200,000 |  | $ 1,000,000 | $ 900,000 |  | $ 3,740,000 |
Financing Receivable, Modifications, Number of Contracts | 0 |  | 0 |  |  |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | 0 |  | 0 | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | $ 1,942,000 | 1,599,000 |  | $ 1,942,000 | 1,599,000 |  | 1,599,000
Loans and Leases Receivable, Net of Deferred Income, Period Increase (Decrease) | 739,000 |  |  | 739,000 |  |  |
Threshold For Loans Evaluated For Impairment [Member] |  |  |  |  |  |  |
Loans and Leases Receivable, before Fees, Gross | 500,000 |  |  | 500,000 |  |  |
Threshold For Loans Evaluated For Impairment [Member] | Outside Consultant [Member] |  |  |  |  |  |  |
Loans and Leases Receivable, before Fees, Gross | 250,000 |  |  | 250,000 |  |  |
Threshold For Loans Evaluated For Impairment [Member] | Criticized Relationships [Member] |  |  |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss, Total | 150,000 |  |  | 150,000 |  |  |
Provision Fluctuation [Member] |  |  |  |  |  |  |
Provision for Loan and Lease Losses, Total |  |  |  |  |  | $ 2,200,000 |
Non-owner occupied Loan [Member] |  |  |  |  |  |  |
Provision for Loan and Lease Losses, Total |  |  | $ 776,000 |  |  | 1,300,000 |
Commercial And Industrial [Member] |  |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 200,558,000 | 232,044,000 |  | 200,558,000 | 232,044,000 |  | 232,044,000
Provision for Loan and Lease Losses, Total | (349,000) |  | 366,000 | $ (281,000) |  | $ 580,000 |
Financing Receivable, Modifications, Number of Contracts |  |  |  | 2 |  | 2 |
Commercial And Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 60,000 | 31,000 |  | $ 60,000 | 31,000 |  | 31,000
Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member] |  |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 90,200,000 |  |  | 90,200,000 |  |  |
Loans and Leases Receivable, Deferred Income, Total | 3,400,000 |  |  | 3,400,000 |  |  |
Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member] | Commercial And Industrial [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  |  | $ 423,000 |  |  | $ 423,000 |
Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member] | Commercial And Industrial [Member] |  |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | $ 90,200,000 | $ 116,100,000 |  | $ 90,200,000 | $ 116,100,000 |  | $ 116,100,000
Financing Receivable, Allowance for Credit Losses, Percentage of Portfolio | 0.40% |  |  | 0.40% |  |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance | $ 361,000 |  |  | $ 361,000 |  |  |

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- Definition Amount of increase (decrease) in the amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References No definition available. + Details
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