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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Loans | $ 1,016,848 | $ 1,069,668 | $ 802,048
Nonaccrual | 1,727 | 6,707 |
Agricultural [Member] |  |  |
Loans | 64,819 | 53,735 | 57,339
Nonaccrual | 313 | 348 |
Agricultural [Member] | Pass [Member] |  |  |
Loans | 61,864 | 50,185 |
Agricultural [Member] | Special Mention [Member] |  |  |
Loans | 339 | 3,202 |
Agricultural [Member] | Substandard [Member] |  |  |
Loans | 2,616 | 348 |
Agricultural [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Consumer Portfolio Segment [Member] |  |  |
Loans | 35,174 | 34,014 | 38,854
Nonaccrual | 0 | 8 |
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 35,174 | 34,006 |
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial and Industrial [Member] |  |  |
Loans | 203,024 | 303,527 | 148,083
Nonaccrual | 285 | 1,802 |
Commercial and Industrial [Member] | Pass [Member] |  |  |
Loans | 201,202 | 294,614 |
Commercial and Industrial [Member] | Special Mention [Member] |  |  |
Loans | 300 | 4,101 |
Commercial and Industrial [Member] | Substandard [Member] |  |  |
Loans | 1,266 | 4,812 |
Commercial and Industrial [Member] | Doubtful [Member] |  |  |
Loans | 256 | 0 |
Construction Real Estate [Member] |  |  |
Loans | 19,066 | 16,639 | 13,411
Nonaccrual | 0 | 80 |
Construction Real Estate [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 19,066 | 16,559 |
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Loans | 525,884 | 469,247 | 326,379
Nonaccrual | 279 | 3,088 |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Loans | 519,537 | 453,080 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans | 778 | 6,006 |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans | 5,569 | 8,925 |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |  |
Loans | 0 | 1,236 |
Residential Portfolio Segment [Member] |  |  |
Loans | 168,881 | 192,506 | $ 217,982
Nonaccrual | 850 | 1,381 |
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 168,031 | 191,125 |
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | $ 0 | $ 0 |

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