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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash and Cash Equivalents, at Carrying Value | $ 51,546 | $ 35,857 | $ 42,363 | $ 34,265
Interest-bearing Deposits in Banks and Other Financial Institutions | 39,400 | 25,800 |  |
Cash Reserve Deposit Required and Made | 9,700 | 10,100 |  |
Goodwill, Impairment Loss | 0 | 0 | 0 |
Goodwill | $ 16,127 | $ 16,127 |  |
Allowance for Loan and Lease Losses, Loss Emergence Period | 1 year 120 days | 1 year |  |
Allowance for Loan and Lease Losses, Adjustments, Change in Loss Emergence Period | $ 500 |  |  |
Fair Value, Collateral Dependent Loans, Percentage of Appraised or Internally Estimated Value of Property | 85.00% |  |  |
Amount of Collateral-dependent Impaired Loans Measured for Impairment By Utilizing Third-party Appraisals | $ 28,000 |  |  |
Percentage of Collateral-dependent Impaired Loans Measured for Impairment By Utilizing Third-party Appraisals | 72.80% |  |  |
Amount of Collateral-Dependent Impaired Loans Measured for Impairment Using Internal Evaluations | $ 10,400 |  |  |
Percentage of Collateral-dependent Impaired Loans Measured for Impairment Using Internal Evaluations | 27.20% |  |  |
Loans and Leases Receivable, Impaired, Commitment to Lend | $ 0 |  |  |
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group | 0 | $ 0 |  |
Other Real Estate | 0 | 533 | 4,932 | $ 6,326
Advertising Expense | $ 2,400 | $ 2,400 | $ 2,100 |
Employee Stock Option [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 0 | 0 | 0 |
Bank Premises and Equipment [Member] | Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |  |
Bank Premises and Equipment [Member] | Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life | 17 years |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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