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Note 8 - Loans Receivable and Credit Disclosures - Average Recorded Investment and Interest Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Impaired financing receivable, with no related allowance, average recorded investment | $ 15,001 | $ 3,533 | $ 12,266 | $ 2,112
Impaired financing receivable, with no related allowance, interest income, accrual method | 361 | 49 | 369 | 135
Impaired financing receivable, with related allowance, average recorded investment | 2,145 | 1,613 | 1,933 | 2,103
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 1
Impaired financing receivable, average recorded investment | 17,146 | 5,146 | 14,199 | 4,215
Impaired financing receivable, interest income, accrual method | 361 | 49 | 369 | 136
Construction Real Estate [Member] |  |  |  |
Impaired financing receivable, with no related allowance, average recorded investment | 83 | 0 | 41 | 0
Impaired financing receivable, with no related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, with related allowance, average recorded investment | 0 | 0 | 0 | 0
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, average recorded investment | 83 | 0 | 41 | 0
Impaired financing receivable, interest income, accrual method | 0 | 0 | 0 | 0
Family Residential Real Estate 1-4 [Member] |  |  |  |
Impaired financing receivable, with no related allowance, average recorded investment | 305 | 364 | 294 | 305
Impaired financing receivable, with no related allowance, interest income, accrual method | 0 | 4 | 0 | 30
Impaired financing receivable, with related allowance, average recorded investment | 957 | 341 | 938 | 226
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, average recorded investment | 1,262 | 705 | 1,232 | 531
Impaired financing receivable, interest income, accrual method | 0 | 4 | 0 | 30
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Impaired financing receivable, with no related allowance, average recorded investment | 11,091 | 637 | 8,221 | 384
Impaired financing receivable, with no related allowance, interest income, accrual method | 0 | 45 | 0 | 105
Impaired financing receivable, with related allowance, average recorded investment | 0 | 0 | 244 | 0
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, average recorded investment | 11,091 | 637 | 8,465 | 384
Impaired financing receivable, interest income, accrual method | 0 | 45 | 0 | 105
Agriculture Real Estate [Member] |  |  |  |
Impaired financing receivable, with no related allowance, average recorded investment | 1,966 | 86 | 1,202 | 79
Impaired financing receivable, with no related allowance, interest income, accrual method | 0 | 0 | 6 | 0
Impaired financing receivable, with related allowance, average recorded investment | 0 | 0 | 0 | 0
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, average recorded investment | 1,966 | 86 | 1,202 | 79
Impaired financing receivable, interest income, accrual method | 0 | 0 | 6 | 0
Commercial Portfolio Segment [Member] |  |  |  |
Impaired financing receivable, with no related allowance, average recorded investment | 735 | 240 | 586 | 241
Impaired financing receivable, with no related allowance, interest income, accrual method | 21 | 0 | 23 | 0
Impaired financing receivable, with related allowance, average recorded investment | 627 | 1,267 | 356 | 1,867
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, average recorded investment | 1,362 | 1,507 | 942 | 2,108
Impaired financing receivable, interest income, accrual method | 21 | 0 | 23 | 0
Agriculture [Member] |  |  |  |
Impaired financing receivable, with no related allowance, average recorded investment | 813 | 2,206 | 1,896 | 1,103
Impaired financing receivable, with no related allowance, interest income, accrual method | 340 | 0 | 340 | 0
Impaired financing receivable, with related allowance, average recorded investment | 531 | 0 | 380 | 0
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, average recorded investment | 1,344 | 2,206 | 2,276 | 1,103
Impaired financing receivable, interest income, accrual method | 340 | 0 | 340 | 0
Consumer and Other [Member] |  |  |  |
Impaired financing receivable, with no related allowance, average recorded investment | 8 | 0 | 26 | 0
Impaired financing receivable, with no related allowance, interest income, accrual method | 0 | 0 | 0 | 0
Impaired financing receivable, with related allowance, average recorded investment | 30 | 5 | 15 | 10
Impaired financing receivable, with related allowance, interest income, accrual method | 0 | 0 | 0 | 1
Impaired financing receivable, average recorded investment | 38 | 5 | 41 | 10
Impaired financing receivable, interest income, accrual method | $ 0 | $ 0 | $ 0 | $ 1

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