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Note 11 - Fair Value and Interest Rate Risk (Details Textual) - USD ($) | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Other Investments, Total | $ 4,963,000 | $ 4,963,000
Solomon Hess SBA Loan Fund [Member] |  |
Other Investments, Total | 4,450,000 |
Bank Time Deposits [Member] |  |
Other Investments, Total | $ 513,000 |
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] |  |
Stock Value Par or Stated Value per Share | $ 100 |

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