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Note 1 - Summary of Significant Accounting Policies (Details Textual) | 12 Months Ended
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Dec. 31, 2018 USD ($)
Loan Payments Delinquency Period Beyond Which Loan is Considered Past Due | 90 days
Nonaccrual Loans Performance Period | 180 days
Collateral Dependent Loans, Value of Significant Properties | $ 200,000
Bank Overdrafts [Member] |
Threshold Period Past Due for Write-off of Financing Receivable | 45 days
Consumer Portfolio Segment [Member] |
Threshold Period Past Due for Write-off of Financing Receivable | 90 days
Maximum [Member] |
Maturity of Time Deposits | 90 days

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- Definition Represents the loan payments delinquency period beyond which a loan is considered past-due. + References No definition available. + Details
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- Definition Period of time that a borrower must demonstrate the ability to make future payments of principal and interest as scheduled to have a loan restored to accrual status. + References No definition available. + Details
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- Definition Period of time between issuance and maturity of customer deposits, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher SEC -Name Industry Guide -Number 3 -Section V -Paragraph D-E + Details
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- Definition Threshold period past due for financing receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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