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Note 8 - Loans Receivable and Credit Disclosures - Impaired Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Impaired financing receivable with no related allowance, recorded investment | $ 14,870 | $ 4,044
Impaired financing receivable with no related allowance, unpaid principal balance | 16,504 | 4,920
Impaired financing receivable with related allowance, recorded investment | 1,518 | 744
Impaired financing receivable with related allowance, unpaid principal balance | 1,859 | 755
Impaired financing receivable, related allowance | 223 | 209
Impaired financing receivable, recorded investment | 16,388 | 4,788
Impaired financing receivable, unpaid principal balance | 18,363 | 5,675
Construction Real Estate [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 165 | 0
Impaired financing receivable with no related allowance, unpaid principal balance | 165 | 0
Impaired financing receivable with related allowance, recorded investment | 0 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 0 | 0
Impaired financing receivable, related allowance | 0 | 0
Impaired financing receivable, recorded investment | 165 | 0
Impaired financing receivable, unpaid principal balance | 165 | 0
Family Residential Real Estate 1-4 [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 386 | 460
Impaired financing receivable with no related allowance, unpaid principal balance | 436 | 796
Impaired financing receivable with related allowance, recorded investment | 946 | 744
Impaired financing receivable with related allowance, unpaid principal balance | 1,283 | 755
Impaired financing receivable, related allowance | 150 | 209
Impaired financing receivable, recorded investment | 1,332 | 1,204
Impaired financing receivable, unpaid principal balance | 1,719 | 1,551
Commercial Real Estate Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 11,046 | 83
Impaired financing receivable with no related allowance, unpaid principal balance | 11,836 | 435
Impaired financing receivable with related allowance, recorded investment | 0 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 0 | 0
Impaired financing receivable, related allowance | 0 | 0
Impaired financing receivable, recorded investment | 11,046 | 83
Impaired financing receivable, unpaid principal balance | 11,836 | 435
Agriculture Real Estate [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 1,868 | 84
Impaired financing receivable with no related allowance, unpaid principal balance | 1,885 | 97
Impaired financing receivable with related allowance, recorded investment | 0 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 0 | 0
Impaired financing receivable, related allowance | 0 | 0
Impaired financing receivable, recorded investment | 1,868 | 84
Impaired financing receivable, unpaid principal balance | 1,885 | 97
Commercial Portfolio Segment [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 947 | 462
Impaired financing receivable with no related allowance, unpaid principal balance | 1,567 | 517
Impaired financing receivable with related allowance, recorded investment | 2 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 2 | 0
Impaired financing receivable, related allowance | 2 | 0
Impaired financing receivable, recorded investment | 949 | 462
Impaired financing receivable, unpaid principal balance | 1,569 | 517
Agriculture [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 448 | 2,951
Impaired financing receivable with no related allowance, unpaid principal balance | 605 | 3,071
Impaired financing receivable with related allowance, recorded investment | 529 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 531 | 0
Impaired financing receivable, related allowance | 41 | 0
Impaired financing receivable, recorded investment | 977 | 2,951
Impaired financing receivable, unpaid principal balance | 1,136 | 3,071
Consumer and Other [Member] |  |
Impaired financing receivable with no related allowance, recorded investment | 10 | 4
Impaired financing receivable with no related allowance, unpaid principal balance | 10 | 4
Impaired financing receivable with related allowance, recorded investment | 41 | 0
Impaired financing receivable with related allowance, unpaid principal balance | 43 | 0
Impaired financing receivable, related allowance | 30 | 0
Impaired financing receivable, recorded investment | 51 | 4
Impaired financing receivable, unpaid principal balance | $ 53 | $ 4

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