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Note 21 - Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Derivative Instruments [Table Text Block]
Forward Start
 
Termination
 
Derivative
 
Notional
   
Rate
 
Rate
 
Estimated Fair Value
   
Estimated Fair Value
 
Inception Date
 
Date
 
Type
 
Amount
   
Paid
 
Hedged
 
at December 31, 2018
   
at December 31, 2017
 
                                           
2/28/2018
 
2/28/2025
 
Interest rate swap
  $
50,000,000
     
2.12
%
3 month LIBOR Floating
  $
1,271,538
    $
567,704