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Note 8 - Loans Receivable and Credit Disclosures - Troubled Debt Restructurings (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($)
Financing receivable modifications, number of contracts |  | 3 |  | 3
Financing receivable modifications, pre-modification outstanding, recorded investment |  | $ 1,035 |  | $ 1,035
Financing receivable modifications, post modification outstanding, recorded investment | $ 10,240 | $ 1,035 | $ 10,485 | $ 1,035
Financing Receivables 30 to 89 Days Past Due [Member] |  |  |  |
Financing receivable modifications, number of contracts | 5 |  | 7 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 10,240 |  | $ 10,485 |
Construction Real Estate [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 0 | 0 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Family Residential Real Estate 1-4 [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 3 | 0 | 3
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 1,035 | $ 0 | $ 1,035
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 1,035 | $ 0 | $ 1,035
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing receivable modifications, number of contracts | 1 | 0 | 2 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 10,157 | $ 0 | $ 10,341 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 10,157 | $ 0 | $ 10,341 | $ 0
Agriculture Real Estate [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 0 | 0 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Commercial Portfolio Segment [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 0 | 1 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 0 | $ 61 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 0 | $ 61 | $ 0
Agriculture [Member] |  |  |  |
Financing receivable modifications, number of contracts | 3 | 0 | 3 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 56 | $ 0 | $ 56 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 56 | $ 0 | $ 56 | $ 0
Consumer and Other [Member] |  |  |  |
Financing receivable modifications, number of contracts | 1 | 0 | 1 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 27 | $ 0 | $ 27 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 27 | $ 0 | $ 27 | $ 0

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