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Note 3 - Loans and Allowance for Loan Losses - Aging Analysis of Loans by Loan Category (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Total Loans |  | $ 1,016,848 |  | $ 1,069,668 | $ 802,048
Loan 90 days and accruing |  | 0 |  | 0 |
Agricultural [Member] |  |  |  |  |
Total Loans |  | 64,819 |  | 53,735 | 57,339
Loan 90 days and accruing |  | 0 |  | 0 |
Commercial and Industrial [Member] |  |  |  |  |
Total Loans |  | 203,024 |  | 303,527 | 148,083
Loan 90 days and accruing |  | 0 |  | 0 |
Consumer Portfolio Segment [Member] |  |  |  |  |
Total Loans |  | 35,174 |  | 34,014 | 38,854
Loan 90 days and accruing |  | 0 |  | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Total Loans |  | 525,884 |  | 469,247 | 326,379
Loan 90 days and accruing |  | 0 |  | 0 |
Construction Real Estate [Member] |  |  |  |  |
Total Loans |  | 19,066 |  | 16,639 | 13,411
Loan 90 days and accruing |  | 0 |  | 0 |
Residential Portfolio Segment [Member] |  |  |  |  |
Total Loans |  | 168,881 |  | 192,506 | $ 217,982
Loan 90 days and accruing |  | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |  |
Total Loans |  | 3,151 | [1] | 3,210 |
Financial Asset, 30 to 59 Days Past Due [Member] | Agricultural [Member] |  |  |  |  |
Total Loans | [1] | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Total Loans | [1] | 21 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 70 |  | 39 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 422 |  | 532 |
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Total Loans | [1] | 1,149 |  | 1,076 |
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 1,489 |  | 1,563 |
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |  |
Total Loans |  | 1,569 | [1] | 589 |
Financial Asset, 60 to 89 Days Past Due [Member] | Agricultural [Member] |  |  |  |  |
Total Loans | [1] | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Total Loans | [1] | 0 |  | 109 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 15 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 13 |  | 44 |
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Total Loans | [1] | 1,235 |  | 180 |
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 306 |  | 256 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |  |
Total Loans |  | 821 | [1] | 2,691 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agricultural [Member] |  |  |  |  |
Total Loans | [1] | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Total Loans | [1] | 88 |  | 515 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 279 |  | 1,744 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Total Loans | [1] | 0 |  | 80 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 454 |  | 352 |
Financial Asset, Past Due [Member] |  |  |  |  |
Total Loans |  | 5,541 | [1] | 6,490 |
Financial Asset, Past Due [Member] | Agricultural [Member] |  |  |  |  |
Total Loans | [1] | 0 |  | 0 |
Financial Asset, Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Total Loans | [1] | 109 |  | 624 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 85 |  | 39 |
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 714 |  | 2,320 |
Financial Asset, Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Total Loans | [1] | 2,384 |  | 1,336 |
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Total Loans | [1] | 2,249 |  | 2,171 |
Financial Asset, Not Past Due [Member] |  |  |  |  |
Total Loans |  | 1,011,307 |  | 1,063,178 |
Financial Asset, Not Past Due [Member] | Agricultural [Member] |  |  |  |  |
Total Loans |  | 64,819 |  | 53,735 |
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Total Loans |  | 202,915 |  | 302,903 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Total Loans |  | 35,089 |  | 33,975 |
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Total Loans |  | 525,170 |  | 466,927 |
Financial Asset, Not Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Total Loans |  | 16,682 |  | 15,303 |
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Total Loans |  | $ 166,632 |  | $ 190,335 |
[1] | Includes nonaccrual loans.

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