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Note 18 - Earnings Per Share (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2015
Stock Redeemed or Called During Period, Value   $ 2,367
Series A Preferred Stock [Member]    
Preferred Stock, Dividend Rate, Percentage   6.00%
Conversion of Stock, Shares Converted 12,784  
Convertible Preferred Stock, Shares Issued upon Conversion 69  
Stock Redeemed or Called During Period, Shares 2,367  
Stock Redeemed or Called During Period, Value $ 2,370  
Dividends Payable $ 9