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Note 12 - Investment Securities and Other Comprehensive Income (Loss) (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
    December 31, 2016
Description   Cost   Gross
Unrealized
Gains
  Gross
Unrealized
Losses
  Fair Value
                                 
Mutual Funds   $
282,828
    $
1,501
    $
-
    $
284,329