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Note 3 - Loans and Allowance for Loan Losses (Details Textual) | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Financing Receivable, Modifications, Number of Contracts | 1 | 7
Past Due 30 Days or More [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 0 |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Details
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