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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans by Loan Category (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Recorded Investment with no related allowance recorded | $ 406 |  | $ 572
Unpaid Principal Balance with no related allowance recorded | 551 |  | 694
Recorded Investment with an allowance recorded | 4,534 |  | 4,861
Unpaid Principal Balance with an allowance recorded | 4,603 |  | 4,943
Related Allowance | 547 |  | 503
Recorded Investment | 4,940 |  | 5,433
Unpaid Principal Balance | 5,154 |  | 5,637
Average Recorded Investment with no related allowance recorded | 489 | $ 4,282 |
Interest Income Recognized with no related allowance recorded | 1 | 4 |
Average Recorded Investment with an allowance recorded | 4,697 | 4,838 |
Interest Income Recognized with an allowance recorded | 64 | 21 |
Average Recorded Investment | 5,186 | 9,120 |
Interest Income Recognized | 65 | 25 |
Agricultural [Member] |  |  |
Recorded Investment with no related allowance recorded | 314 |  | 314
Unpaid Principal Balance with no related allowance recorded | 428 |  | 428
Recorded Investment with an allowance recorded | 2,228 |  | 2,302
Unpaid Principal Balance with an allowance recorded | 2,228 |  | 2,302
Related Allowance | 253 |  | 251
Recorded Investment | 2,542 |  | 2,616
Unpaid Principal Balance | 2,656 |  | 2,730
Average Recorded Investment with no related allowance recorded | 314 | 348 |
Interest Income Recognized with no related allowance recorded | 0 | 0 |
Average Recorded Investment with an allowance recorded | 2,265 | 1,413 |
Interest Income Recognized with an allowance recorded | 42 | 0 |
Average Recorded Investment | 2,579 | 1,761 |
Interest Income Recognized | 42 | 0 |
Commercial and Industrial [Member] |  |  |
Recorded Investment with no related allowance recorded | 92 |  | 0
Unpaid Principal Balance with no related allowance recorded | 123 |  | 0
Recorded Investment with an allowance recorded | 264 |  | 339
Unpaid Principal Balance with an allowance recorded | 279 |  | 363
Related Allowance | 116 |  | 95
Recorded Investment | 356 |  | 339
Unpaid Principal Balance | 402 |  | 363
Average Recorded Investment with no related allowance recorded | 46 | 1,490 |
Interest Income Recognized with no related allowance recorded | 1 | 0 |
Average Recorded Investment with an allowance recorded | 301 | 155 |
Interest Income Recognized with an allowance recorded | 2 | 0 |
Average Recorded Investment | 347 | 1,645 |
Interest Income Recognized | 3 | 0 |
Consumer Portfolio Segment [Member] |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 0
Unpaid Principal Balance with no related allowance recorded | 0 |  | 0
Recorded Investment with an allowance recorded | 32 |  | 14
Unpaid Principal Balance with an allowance recorded | 32 |  | 15
Related Allowance | 3 |  | 2
Recorded Investment | 32 |  | 14
Unpaid Principal Balance | 32 |  | 15
Average Recorded Investment with no related allowance recorded | 0 | 0 |
Interest Income Recognized with no related allowance recorded | 0 | 0 |
Average Recorded Investment with an allowance recorded | 23 | 4 |
Interest Income Recognized with an allowance recorded | 0 | 0 |
Average Recorded Investment | 23 | 4 |
Interest Income Recognized | 0 | 0 |
Construction Real Estate [Member] |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 0
Unpaid Principal Balance with no related allowance recorded | 0 |  | 0
Recorded Investment with an allowance recorded | 0 |  | 0
Unpaid Principal Balance with an allowance recorded | 0 |  | 0
Related Allowance | 0 |  | 0
Recorded Investment | 0 |  | 0
Unpaid Principal Balance | 0 |  | 0
Average Recorded Investment with no related allowance recorded | 0 | 40 |
Interest Income Recognized with no related allowance recorded | 0 | 0 |
Average Recorded Investment with an allowance recorded | 0 | 0 |
Interest Income Recognized with an allowance recorded | 0 | 0 |
Average Recorded Investment | 0 | 40 |
Interest Income Recognized | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 94
Unpaid Principal Balance with no related allowance recorded | 0 |  | 94
Recorded Investment with an allowance recorded | 157 |  | 179
Unpaid Principal Balance with an allowance recorded | 157 |  | 179
Related Allowance | 8 |  | 9
Recorded Investment | 157 |  | 273
Unpaid Principal Balance | 157 |  | 273
Average Recorded Investment with no related allowance recorded | 47 | 2,238 |
Interest Income Recognized with no related allowance recorded | 0 | 3 |
Average Recorded Investment with an allowance recorded | 168 | 778 |
Interest Income Recognized with an allowance recorded | 3 | 4 |
Average Recorded Investment | 215 | 3,016 |
Interest Income Recognized | 3 | 7 |
Residential Portfolio Segment [Member] |  |  |
Recorded Investment with no related allowance recorded | 0 |  | 164
Unpaid Principal Balance with no related allowance recorded | 0 |  | 172
Recorded Investment with an allowance recorded | 1,853 |  | 2,027
Unpaid Principal Balance with an allowance recorded | 1,907 |  | 2,084
Related Allowance | 167 |  | 146
Recorded Investment | 1,853 |  | 2,191
Unpaid Principal Balance | 1,907 |  | $ 2,256
Average Recorded Investment with no related allowance recorded | 82 | 166 |
Interest Income Recognized with no related allowance recorded | 0 | 1 |
Average Recorded Investment with an allowance recorded | 1,940 | 2,488 |
Interest Income Recognized with an allowance recorded | 17 | 17 |
Average Recorded Investment | 2,022 | 2,654 |
Interest Income Recognized | $ 17 | $ 18 |

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