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Note 18 - Derivative Financial Instruments (Tables)
 9 Months Ended
Sep. 30, 2017
Designated as Hedging Instrument [Member]  
Notes Tables  
Schedule of Interest Rate Derivatives [Table Text Block]
(dollars in thousands)
                        
                                   
 
 
 
        
 
 
 
  
Fair value
  
Notional
  
Maturity
  
Receive (variable)
  
Pay fixed
    
assets (liabilities)
  
amount
  
date
  
index
  
swap rate
    
September 30, 2017
    
December 31, 2016
  
$ 10,000  
12/6/2021
  
US 3 Month LIBOR
   
1.89
 %   $
26
     $
16
  
  20,000  
12/6/2020
  
US 3 Month LIBOR
   
1.79
 %    
8
      
9
  
$ 30,000  
 
  
 
    
1.82
 %   $
34
     $
25
  
Not Designated as Hedging Instrument [Member]  
Notes Tables  
Schedule of Interest Rate Derivatives [Table Text Block]
(dollar amounts in thousands)
  
Receiving
    
Paying
  
   
September 30,
    
December 31,
    
September 30,
    
December 31,
  
   
2017
    
2016
    
2017
    
2016
  
Notional amount
   $
53,214
     $
43,986
     $
53,214
     $
43,986
  
Weighted average maturity (years)
    
8.9
      
9.9
      
8.9
      
9.9
  
Fair value
   $
148
     $
(178
 )   $
(148
 )   $
178