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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | --- | ---
Loans | $ 1,035,083 | $ 1,069,668 | $ 811,577
Nonaccrual | 5,173 | 6,707 |
Agricultural [Member] |  |  |
Loans | 46,686 | 53,735 | 50,483
Nonaccrual | 348 | 348 |
Agricultural [Member] | Pass [Member] |  |  |
Loans | 43,145 | 50,185 |
Agricultural [Member] | Special Mention [Member] |  |  |
Loans | 368 | 3,202 |
Agricultural [Member] | Substandard [Member] |  |  |
Loans | 3,173 | 348 |
Agricultural [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Consumer Portfolio Segment [Member] |  |  |
Loans | 32,330 | 34,014 | 34,252
Nonaccrual | 0 | 8 |
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 32,330 | 34,006 |
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial and Industrial [Member] |  |  |
Loans | 298,050 | 303,527 | 141,201
Nonaccrual | 1,699 | 1,802 |
Commercial and Industrial [Member] | Pass [Member] |  |  |
Loans | 289,781 | 294,614 |
Commercial and Industrial [Member] | Special Mention [Member] |  |  |
Loans | 2,109 | 4,101 |
Commercial and Industrial [Member] | Substandard [Member] |  |  |
Loans | 6,160 | 4,812 |
Commercial and Industrial [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Construction Real Estate [Member] |  |  |
Loans | 15,670 | 16,639 | 17,525
Nonaccrual | 0 | 80 |
Construction Real Estate [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 15,670 | 16,559 |
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Loans | 462,421 | 469,247 | 351,753
Nonaccrual | 1,850 | 3,088 |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Loans | 449,666 | 453,080 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans | 3,674 | 6,006 |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans | 9,081 | 8,925 |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |  |
Loans | 0 | 1,236 |
Residential Portfolio Segment [Member] |  |  |
Loans | 179,926 | 192,506 | $ 216,363
Nonaccrual | 1,276 | 1,381 |
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 178,650 | 191,125 |
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | $ 0 | $ 0 |

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