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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2020
--- | --- | --- | ---
Loans | $ 1,004,587 | $ 1,069,668 | $ 907,993
Nonaccrual | 1,923 | 6,707 |
Agricultural [Member] |  |  |
Loans | 46,567 | 53,735 | 50,935
Nonaccrual | 348 | 348 |
Agricultural [Member] | Pass [Member] |  |  |
Loans | 43,040 | 50,185 |
Agricultural [Member] | Special Mention [Member] |  |  |
Loans | 360 | 3,202 |
Agricultural [Member] | Substandard [Member] |  |  |
Loans | 3,167 | 348 |
Agricultural [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Consumer Portfolio Segment [Member] |  |  |
Loans | 33,370 | 34,014 | 33,769
Nonaccrual | 0 | 8 |
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 33,370 | 34,006 |
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial and Industrial [Member] |  |  |
Loans | 265,032 | 303,527 | 242,012
Nonaccrual | 338 | 1,802 |
Commercial and Industrial [Member] | Pass [Member] |  |  |
Loans | 260,047 | 294,614 |
Commercial and Industrial [Member] | Special Mention [Member] |  |  |
Loans | 3,086 | 4,101 |
Commercial and Industrial [Member] | Substandard [Member] |  |  |
Loans | 1,702 | 4,812 |
Commercial and Industrial [Member] | Doubtful [Member] |  |  |
Loans | 197 | 0 |
Construction Real Estate [Member] |  |  |
Loans | 15,440 | 16,639 | 15,576
Nonaccrual | 0 | 80 |
Construction Real Estate [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 15,440 | 16,559 |
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Loans | 473,987 | 469,247 | 363,063
Nonaccrual | 184 | 3,088 |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Loans | 464,426 | 453,080 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans | 2,504 | 6,006 |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans | 7,057 | 8,925 |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |  |
Loans | 0 | 1,236 |
Residential Portfolio Segment [Member] |  |  |
Loans | 170,191 | 192,506 | $ 202,638
Nonaccrual | 1,053 | 1,381 |
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 169,138 | 191,125 |
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | $ 0 | $ 0 |

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