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Note 4 - Loans (Details Textual) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Loan Balance For Reviewing High Risk Loans Minimum | $ 250,000 |  | $ 250,000 |  | $ 250,000
Impaired Financing Receivable, Recorded Investment, Total | 24,179,000 | $ 21,789,000 | 24,179,000 | $ 21,789,000 | 24,473,000
Impaired Financing Receivable, Related Allowance | 1,566,000 | $ 1,474,000 | 1,566,000 | $ 1,474,000 | 1,418,000
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 0 |  | $ 0 |  |
Financing Receivable, Modifications, Number of Contracts | 0 | 0 | 0 | 0 |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | 0 | 0 | 0 | 1 |
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down |  |  | $ 131,000 |  |
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |
Impaired Financing Receivable, Recorded Investment, Total | $ 165,000 | $ 0 | 165,000 | $ 0 | 0
Impaired Financing Receivable, Related Allowance |  | $ 0 |  | $ 0 | $ 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 http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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