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Note 7 - Loans - Impaired Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Unpaid principal - with no allowance | $ 1,609 | $ 2,139
Recorded investment - with no allowance | 1,581 | 2,111
Unpaid principal - with allowance | 6,709 | 3,375
Recorded investment - with allowance | 6,709 | 3,375
Related allowance | 2,227 | 1,051
Unpaid principal | 8,318 | 5,514
Recorded investment | 8,290 | 5,486
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member] |  |
Unpaid principal - with no allowance | 180 | 645
Recorded investment - with no allowance | 152 | 617
Unpaid principal - with allowance | 404 | 406
Recorded investment - with allowance | 404 | 406
Related allowance | 0 | 0
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member] |  |
Unpaid principal - with no allowance | 41 | 42
Recorded investment - with no allowance | 41 | 42
Unpaid principal - with allowance | 326 | 326
Recorded investment - with allowance | 326 | 326
Related allowance | 194 | 176
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] |  |
Unpaid principal - with no allowance | 714 | 684
Recorded investment - with no allowance | 714 | 684
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |
Unpaid principal - with no allowance | 587 | 563
Recorded investment - with no allowance | 587 | 563
Unpaid principal - with allowance | 4,387 | 904
Recorded investment - with allowance | 4,387 | 904
Related allowance | 1,325 | 149
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member] |  |
Unpaid principal - with no allowance | 87 | 129
Recorded investment - with no allowance | 87 | 129
Unpaid principal - with allowance | 337 | 478
Recorded investment - with allowance | 337 | 478
Related allowance | 34 | 48
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |
Unpaid principal - with no allowance | 0 | 76
Recorded investment - with no allowance | 0 | 76
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |
Unpaid principal - with allowance | 1,255 | 1,261
Recorded investment - with allowance | 1,255 | 1,261
Related allowance | $ 674 | $ 678

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524 + Details
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