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Note 9 - Long-term Debt (Tables)
9 Months Ended
Sep. 30, 2015
Notes Tables  
Schedule of Debt [Table Text Block]
   
Weighted
Average
Interest Rate
   
Maturities
   
September 30, 2015
   
December 31, 2014
 
 
 
Variable
 
 
 
 
 
 
(dollars in thousands)
 
Credit Facility, interest payable monthly
    0.9%       2015    
   
 
                                 
Unsecured term note payable to National, interest payable quarterly, principal payable at maturity
    2.8%       2018       10,000       10,000  
                      10,000       10,000  
Less current portion
                 
   
 
                    $ 10,000     $ 10,000