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Note 3 - Loans and Allowance for Loan Losses - Aging Analysis of Loans by Loan Category (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021
--- | --- | --- | ---
Loans |  | $ 1,027,406 |  | $ 1,016,848 | $ 1,035,083
Loan 90 days and accruing |  | 0 |  | 0 |
Agricultural [Member] |  |  |  |  |
Loans |  | 61,618 |  | 64,819 | 46,686
Loan 90 days and accruing |  | 0 |  | 0 |
Commercial and Industrial [Member] |  |  |  |  |
Loans |  | 198,914 |  | 203,024 | 298,050
Loan 90 days and accruing |  | 0 |  | 0 |
Consumer Portfolio Segment [Member] |  |  |  |  |
Loans |  | 36,151 |  | 35,174 | 32,330
Loan 90 days and accruing |  | 0 |  | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans |  | 537,252 |  | 525,884 | 462,421
Loan 90 days and accruing |  | 0 |  | 0 |
Construction Real Estate [Member] |  |  |  |  |
Loans |  | 15,669 |  | 19,066 | 15,670
Loan 90 days and accruing |  | 0 |  | 0 |
Residential Portfolio Segment [Member] |  |  |  |  |
Loans |  | 177,802 |  | 168,881 | $ 179,926
Loan 90 days and accruing |  | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |  |
Loans |  | 2,098 | [1] | 3,151 |
Financial Asset, 30 to 59 Days Past Due [Member] | Agricultural [Member] |  |  |  |  |
Loans | [1] | 0 |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Loans | [1] | 0 |  | 21 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 66 |  | 70 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 0 |  | 422 |
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Loans | [1] | 0 |  | 1,149 |
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 2,032 |  | 1,489 |
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |  |
Loans |  | 121 | [1] | 1,569 |
Financial Asset, 60 to 89 Days Past Due [Member] | Agricultural [Member] |  |  |  |  |
Loans | [1] | 0 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Loans | [1] | 93 |  | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 0 |  | 15 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 0 |  | 13 |
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Loans | [1] | 0 |  | 1,235 |
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 28 |  | 306 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |  |
Loans |  | 117 | [1] | 821 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agricultural [Member] |  |  |  |  |
Loans | [1] | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Loans | [1] | 85 |  | 88 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 32 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 0 |  | 279 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Loans | [1] | 0 |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 0 |  | 454 |
Financial Asset, Past Due [Member] |  |  |  |  |
Loans |  | 2,336 | [1] | 5,541 |
Financial Asset, Past Due [Member] | Agricultural [Member] |  |  |  |  |
Loans | [1] | 0 |  | 0 |
Financial Asset, Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Loans | [1] | 178 |  | 109 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 98 |  | 85 |
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 0 |  | 714 |
Financial Asset, Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Loans | [1] | 0 |  | 2,384 |
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Loans | [1] | 2,060 |  | 2,249 |
Financial Asset, Not Past Due [Member] |  |  |  |  |
Loans |  | 1,025,070 |  | 1,011,307 |
Financial Asset, Not Past Due [Member] | Agricultural [Member] |  |  |  |  |
Loans |  | 61,618 |  | 64,819 |
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member] |  |  |  |  |
Loans |  | 198,736 |  | 202,915 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Loans |  | 36,053 |  | 35,089 |
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans |  | 537,252 |  | 525,170 |
Financial Asset, Not Past Due [Member] | Construction Real Estate [Member] |  |  |  |  |
Loans |  | 15,669 |  | 16,682 |
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |  |
Loans |  | $ 175,742 |  | $ 166,632 |
[1] | Includes nonaccrual loans.

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