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Note 7 - Derivatives and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] |
Effective Date | Maturity Date | Balance Sheet Location |  | Notional Amount |  | Accounting Treatment |  | December 31, 2017 Fair Value |  |  | December 31, 2016 Fair Value |
June 5, 2014 | June 5, 2019 | Other Assets |  | $ | 15,000,000 |  | Cash Flow Hedging |  | $ | 190,085 |  |  | $ | 179,939 |
June 5, 2014 | June 5, 2021 | Other Assets |  |  | 15,000,000 |  | Cash Flow Hedging |  |  | 316,615 |  |  |  | 396,588 |
|  |  |  | $ | 30,000,000 |  |  |  | $ | 506,700 |  |  | $ | 576,527 |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
|  | Year Ended |
|  | December 31, 2017 |  |  | December 31, 2016 |
Unrealized loss at beginning of period, net of tax |  | $ | (932,156 | ) |  | $ | (799,421 | )
Amount reclassified from accumulated other comprehensive income to noninterest income related to hedge ineffectiveness |  |  | - |  |  |  | (76,797 | )
Amount reclassified from accumulated other comprehensive income to noninterest expense related to hedge ineffectiveness |  |  | 79,757 |  |  |  | - |
Amount reclassified from accumulated other comprehensive income to interest expense related to caplet amortization |  |  | 405,134 |  |  |  | 152,087 |
Amount of loss recognized in other comprehensive income, net of tax |  |  | (357,762 | ) |  |  | (208,025 | )
Unrealized loss at end of period, net of tax |  | $ | (805,027 | ) |  | $ | (932,156 | )

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 + Details
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