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Note 13 - Condensed Financial Statements of Parent Company - Condensed Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and due from banks | $ 12,926 | $ 13,974 | $ 12,152 | $ 12,894
Interest-bearing deposits | 51,233 | 80,268 |  |
Securities available for sale, at fair value | 331,387 | 304,282 |  |
Other assets | 16,454 | 13,128 |  |
Total assets | 1,256,757 | 1,233,942 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Other liabilities | 12,065 | 12,182 |  |
Stockholders’ equity | 184,896 | 178,263 | $ 172,114 | $ 166,303
Total liabilities and stockholders’ equity | 1,256,757 | 1,233,942 |  |
Parent Company [Member] |  |  |  |
Assets |  |  |  |
Cash and due from banks | 46 | 74 |  |
Interest-bearing deposits | 503 | 1,310 |  |
Securities available for sale, at fair value |  | 163 |  |
Investments in subsidiaries, at equity | 184,336 | 177,150 |  |
Refundable income taxes | 168 | 22 |  |
Other assets | 820 | 561 |  |
Total assets | 185,873 | 179,280 |  |
Liabilities and Stockholders’ Equity |  |  |  |
Other liabilities | 977 | 1,017 |  |
Stockholders’ equity | 184,896 | 178,263 |  |
Total liabilities and stockholders’ equity | $ 185,873 | $ 179,280 |  |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
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