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Note 1 - Summary of Significant Accounting Policies (Details Textual) | 12 Months Ended
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Dec. 31, 2019 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] |
Financing Receivable, Threshold Period Past Due, Writeoff | 45 days
Consumer Portfolio Segment [Member] |
Financing Receivable, Threshold Period Past Due, Writeoff | 90 days
Maximum [Member] |
Maturity of Time Deposits | 90 days

X
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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 Threshold period for when financing receivable is considered past due to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919253-210447 + 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 SEC -Name Industry Guide -Number 3 -Section V -Paragraph D-E + Details
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