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Note 11 - Fair Value and Interest Rate Risk (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Other Investments, Total | $ 4,450 | $ 4,450
Solomon Hess SBA Loan Fund [Member] |  |
Other Investments, Total | $ 4,500 |
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] |  |
Stock Value Par or Stated Value per Share | $ 100 |

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