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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Loans | $ 1,069,668 | $ 802,048 | $ 409,073
Nonaccrual | 6,707 | 4,687 |
Agricultural [Member] |  |  |
Loans | 53,735 | 57,339 | 49,109
Nonaccrual | 348 | 379 |
Agricultural [Member] | Pass [Member] |  |  |
Loans | 50,185 | 55,866 |
Agricultural [Member] | Special Mention [Member] |  |  |
Loans | 3,202 | 1,094 |
Agricultural [Member] | Substandard [Member] |  |  |
Loans | 348 | 379 |
Agricultural [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Consumer Portfolio Segment [Member] |  |  |
Loans | 34,014 | 38,854 | 24,382
Nonaccrual | 8 | 16 |
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 34,006 | 38,838 |
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial and Industrial [Member] |  |  |
Loans | 303,527 | 148,083 | 91,406
Nonaccrual | 1,802 | 776 |
Commercial and Industrial [Member] | Pass [Member] |  |  |
Loans | 294,614 | 146,728 |
Commercial and Industrial [Member] | Special Mention [Member] |  |  |
Loans | 4,101 | 1,081 |
Commercial and Industrial [Member] | Substandard [Member] |  |  |
Loans | 4,812 | 274 |
Commercial and Industrial [Member] | Doubtful [Member] |  |  |
Loans | 0 | 0 |
Construction Real Estate [Member] |  |  |
Loans | 16,639 | 13,411 | 8,843
Nonaccrual | 80 | 0 |
Construction Real Estate [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 16,559 | 13,411 |
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Loans | 469,247 | 326,379 | 139,453
Nonaccrual | 3,088 | 2,185 |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Loans | 453,080 | 322,105 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans | 6,006 | 1,332 |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans | 8,925 | 2,942 |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |  |
Loans | 1,236 | 0 |
Residential Portfolio Segment [Member] |  |  |
Loans | 192,506 | 217,982 | $ 95,880
Nonaccrual | 1,381 | 1,331 |
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member] |  |  |
Loans | 191,125 | 216,651 |
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member] |  |  |
Loans | $ 0 | $ 0 |

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