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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | --- | ---
Loans | $ 907,993 | $ 802,048 | $ 397,227
Nonaccrual | 4,135 | 4,687 |
Agricultural [Member] |  |  |
Loans | 50,935 | 57,339 | 40,881
Nonaccrual | 379 | 379 |
Agricultural [Member] | Pass [Member] |  |  |
Loans | 46,822 | 55,866 |
Agricultural [Member] | Special Mention [Member] |  |  |
Loans | 3,734 | 1,094 |
Agricultural [Member] | Substandard [Member] |  |  |
Loans | 379 | 379 |
Agricultural [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Consumer Portfolio Segment [Member] |  |  |
Loans | 33,769 | 38,854 | 24,682
Nonaccrual | 23 | 16 |
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 33,746 | 38,838 |
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial and Industrial [Member] |  |  |
Loans | 242,012 | 148,083 | 85,082
Nonaccrual | 758 | 776 |
Commercial and Industrial [Member] | Pass [Member] |  |  |
Loans | 236,874 | 146,728 |
Commercial and Industrial [Member] | Special Mention [Member] |  |  |
Loans | 1,040 | 1,081 |
Commercial and Industrial [Member] | Substandard [Member] |  |  |
Loans | 4,098 | 274 |
Commercial and Industrial [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Construction Real Estate [Member] |  |  |
Loans | 15,576 | 13,411 | 9,948
Nonaccrual | 0 | 0 |
Construction Real Estate [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 15,576 | 13,411 |
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Loans | 363,063 | 326,379 | 140,942
Nonaccrual | 2,146 | 2,185 |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Loans | 356,813 | 322,105 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans | 2,537 | 1,332 |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans | 3,492 | 2,942 |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |  |
Loans | 221 | 0 |
Residential Portfolio Segment [Member] |  |  |
Loans | 202,638 | 217,982 | $ 95,692
Nonaccrual | 829 | 1,331 |
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 201,809 | 216,651 |
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | $ 0 | $ 0 |

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