Note 9 - Securities Sold Under Agreements to Repurchase and Other Long-term Borrowings (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
December 31, (Dollars in thousands)
  
2016
    
Average
Rate
   
2015
    
Average
Rate
 
Federal Home Loan Bank advances
   $
18,646
      
3.97
 %   $
18,806
      
3.98
 %
Subordinated notes payable
    
33,506
      
2.30
      
48,970
      
1.94
  
Securities sold under agreements to repurchase
    
1,285
      
0.75
      
101,474
      
3.90
  
Total long-term borrowings
   $
53,437
      
2.84
 %   $
169,250
      
3.34
 %
Schedule of Maturities of Long-term Debt [Table Text Block]
(In thousands)
  
Amount
  
2017
   $
15,258
  
2018
    
3,251
  
2019
    
786
  
2020
    
636
  
2021
    
-
  
Thereafter
    
33,506
  
Total
   $
53,437
  
Schedule of Repurchase Agreements [Table Text Block]
   
Remaining Contractual Maturity of the Agreements
  
December 31, 2016 (In thousands)
  
Overnight/

Continuous
    
Less Than
30 Days
    
30-89

Days
    
90 Days to
One Year
    
Over One
Year to
Four Years
    
Total
  
U.S. government agency securities
   $
33,682
     $
1,203
     $
-
     $
458
     $
1,027
     $
36,370
  
Total
   $
33,682
     $
1,203
     $
-
     $
458
     $
1,027
     $
36,370
  
   
Remaining Contractual Maturity of the Agreements
  
December 31, 2015 (In thousands)
  
Overnight/

Continuous
    
Less Than
30 Days
    
30-89

Days
    
90 Days to
One Year
    
Over One
Year to
Four Years
    
Total
  
U.S. government agency securities
   $
33,151
     $
1,202
     $
-
     $
716
     $
100,758
     $
135,827
  
Total
   $
33,151
     $
1,202
     $
-
     $
716
     $
100,758
     $
135,827