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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans by Loan Category (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Recorded Investment with no related allowance recorded | $ 401 |  | $ 401 |  | $ 2,728
Unpaid Principal Balance with no related allowance recorded | 465 |  | 465 |  | 3,398
Recorded Investment with an allowance recorded | 4,895 |  | 4,895 |  | 3,194
Unpaid Principal Balance with an allowance recorded | 5,656 |  | 5,656 |  | 3,323
Related Allowance | 497 |  | 497 |  | 355
Recorded Investment | 5,296 |  | 5,296 |  | 5,922
Unpaid Principal Balance | 6,121 |  | 6,121 |  | 6,721
Average Recorded Investment with no related allowance recorded | 1,309 | $ 1,842 | 1,782 | $ 285 |
Interest Income Recognized with no related allowance recorded | 0 | 63 | 0 | 139 |
Average Recorded Investment with an allowance recorded | 4,027 | 4,039 | 3,749 | 4,433 |
Interest Income Recognized with an allowance recorded | 27 | 0 | 64 | 0 |
Average Recorded Investment | 5,336 | 5,881 | 5,531 | 4,718 |
Interest Income Recognized | 27 | 63 | 64 | 139 |
Agricultural [Member] |  |  |  |  |
Recorded Investment with no related allowance recorded | 379 |  | 379 |  | 545
Unpaid Principal Balance with no related allowance recorded | 440 |  | 440 |  | 545
Recorded Investment with an allowance recorded | 0 |  | 0 |  | 379
Unpaid Principal Balance with an allowance recorded | 0 |  | 0 |  | 439
Related Allowance | 0 |  | 0 |  | 103
Recorded Investment | 379 |  | 379 |  | 924
Unpaid Principal Balance | 440 |  | 440 |  | 984
Average Recorded Investment with no related allowance recorded | 190 | 0 | 308 | 62 |
Interest Income Recognized with no related allowance recorded | 0 | 0 | 0 | 0 |
Average Recorded Investment with an allowance recorded | 190 | 389 | 253 | 390 |
Interest Income Recognized with an allowance recorded | 0 | 0 | 0 | 0 |
Average Recorded Investment | 380 | 389 | 561 | 452 |
Interest Income Recognized | 0 | 0 | 0 | 0 |
Commercial and Industrial [Member] |  |  |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 0 |  | 259
Unpaid Principal Balance with no related allowance recorded | 0 |  | 0 |  | 340
Recorded Investment with an allowance recorded | 321 |  | 321 |  | 0
Unpaid Principal Balance with an allowance recorded | 404 |  | 404 |  | 0
Related Allowance | 31 |  | 31 |  | 0
Recorded Investment | 321 |  | 321 |  | 259
Unpaid Principal Balance | 404 |  | 404 |  | 340
Average Recorded Investment with no related allowance recorded | 129 | 0 | 173 | 0 |
Interest Income Recognized with no related allowance recorded | 0 | 6 | 0 | 10 |
Average Recorded Investment with an allowance recorded | 167 | 193 | 116 | 136 |
Interest Income Recognized with an allowance recorded | 0 | 0 | 0 | 0 |
Average Recorded Investment | 296 | 193 | 289 | 136 |
Interest Income Recognized | 0 | 6 | 0 | 10 |
Consumer Portfolio Segment [Member] |  |  |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 0 |  | 0
Unpaid Principal Balance with no related allowance recorded | 0 |  | 0 |  | 0
Recorded Investment with an allowance recorded | 24 |  | 24 |  | 17
Unpaid Principal Balance with an allowance recorded | 24 |  | 24 |  | 18
Related Allowance | 6 |  | 6 |  | 4
Recorded Investment | 24 |  | 24 |  | 18
Unpaid Principal Balance | 24 |  | 24 |  | 18
Average Recorded Investment with no related allowance recorded | 0 | 0 | 0 | 0 |
Interest Income Recognized with no related allowance recorded | 0 | 0 | 0 | 0 |
Average Recorded Investment with an allowance recorded | 19 | 58 | 19 | 69 |
Interest Income Recognized with an allowance recorded | 0 | 0 | 0 | 0 |
Average Recorded Investment | 19 | 59 | 19 | 70 |
Interest Income Recognized | 0 | 0 | 0 | 0 |
Construction Real Estate [Member] |  |  |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 0 |  | 0
Unpaid Principal Balance with no related allowance recorded | 0 |  | 0 |  | 0
Recorded Investment with an allowance recorded | 0 |  | 0 |  | 0
Unpaid Principal Balance with an allowance recorded | 0 |  | 0 |  | 0
Related Allowance | 0 |  | 0 |  | 0
Recorded Investment | 0 |  | 0 |  | 0
Unpaid Principal Balance | 0 |  | 0 |  | 0
Average Recorded Investment with no related allowance recorded | 0 | 0 | 0 | 0 |
Interest Income Recognized with no related allowance recorded | 0 | 0 | 0 | 0 |
Average Recorded Investment with an allowance recorded | 0 | 0 | 0 | 0 |
Interest Income Recognized with an allowance recorded | 0 | 0 | 0 | 0 |
Average Recorded Investment | 0 | 0 | 0 | 0 |
Interest Income Recognized | 0 | 0 | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 0 |  | 1,882
Unpaid Principal Balance with no related allowance recorded | 0 |  | 0 |  | 2,471
Recorded Investment with an allowance recorded | 2,246 |  | 2,246 |  | 406
Unpaid Principal Balance with an allowance recorded | 2,836 |  | 2,836 |  | 406
Related Allowance | 235 |  | 235 |  | 13
Recorded Investment | 2,246 |  | 2,246 |  | 2,287
Unpaid Principal Balance | 2,836 |  | 2,836 |  | 2,877
Average Recorded Investment with no related allowance recorded | 941 | 506 | 1,255 | 49 |
Interest Income Recognized with no related allowance recorded | 0 | 32 | 0 | 75 |
Average Recorded Investment with an allowance recorded | 1,312 | 882 | 1,005 | 1,340 |
Interest Income Recognized with an allowance recorded | 5 | 0 | 12 | 0 |
Average Recorded Investment | 2,253 | 1,387 | 2,260 | 1,388 |
Interest Income Recognized | 5 | 32 | 12 | 75 |
Residential Portfolio Segment [Member] |  |  |  |  |
Recorded Investment with no related allowance recorded | 22 |  | 22 |  | 42
Unpaid Principal Balance with no related allowance recorded | 25 |  | 25 |  | 42
Recorded Investment with an allowance recorded | 2,304 |  | 2,304 |  | 2,392
Unpaid Principal Balance with an allowance recorded | 2,392 |  | 2,392 |  | 2,460
Related Allowance | 225 |  | 225 |  | 235
Recorded Investment | 2,326 |  | 2,326 |  | 2,434
Unpaid Principal Balance | 2,417 |  | 2,417 |  | $ 2,502
Average Recorded Investment with no related allowance recorded | 49 | 1,336 | 46 | 174 |
Interest Income Recognized with no related allowance recorded | 0 | 25 | 0 | 54 |
Average Recorded Investment with an allowance recorded | 2,339 | 2,517 | 2,356 | 2,498 |
Interest Income Recognized with an allowance recorded | 22 | 0 | 52 | 0 |
Average Recorded Investment | 2,388 | 3,853 | 2,402 | 2,672 |
Interest Income Recognized | $ 22 | $ 25 | $ 52 | $ 54 |

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