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Note 8 - Fair Value (Details Textual) Pure in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Impaired Financing Receivable, Related Allowance | $ 20,000 |  | $ 20,000 |  |
Number of Loans Measured for Impairment Using Fair Value of Collateral |  |  |  |  | 0
Provision for Loan and Lease Losses, Total | (187,000) | $ (134,000) | 326,000 | $ 3,736,000 |
Other Real Estate, Valuation Adjustments | (0) | 17,000 | (0) | 38,000 | $ 0
Impaired Loans [Member] |  |  |  |  |
Provision for Loan and Lease Losses, Total | 20,000 | 0 | 20,000 | 0 |
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member] |  |  |  |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 288,000 |  | 288,000 |  |
Impaired Financing Receivable, Related Allowance | 20,000 |  | 20,000 |  |
Provision for Loan and Lease Losses, Total | $ 115,000 | $ 77,000 | $ 541,000 | $ (176,000) |

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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524 + Details
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- Definition Valuation adjustments made to other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References No definition available. + Details
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