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Note 9 - Fair Value (Tables) | 9 Months Ended
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Sep. 30, 2018
Notes Tables |
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] |
|  | Total Carrying |  |  | Quoted Prices |  |  |  |  |  |  | Total Changes |
|  | Amount in |  |  | in Active |  |  |  |  |  |  | in Fair Values |
|  | Consolidated |  |  | Markets for |  |  |  |  |  |  | Included in |
|  | Balance Sheet |  |  | Identical |  |  | Trading Gains |  |  | Current Period |
|  | Sept. 30, 2018 |  |  | Assets |  |  | and Losses |  |  | Earnings (Loss) |
Trading securities |  | $ | - |  |  | $ | - |  |  | $ | 6,406 |  |  | $ | (132,191 | )
Securities available for sale |  |  | 98,799,898 |  |  |  | 98,799,898 |  |  |  | 424,127 |  |  |  | 258,913 |
|  |  |  |  |  |  |  |  |  | $ | 430,533 |  |  | $ | 126,722 |

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