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Note 14 - Stock Option Grants (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
2016
   
2015
 
   
 
 
Risk-free interest rate
 
 
1.58
%  
 
1.52
%
Expected term
   
7.5 years
     
7.5 years
 
Expected stock price volatility
   
25.25
%
   
54.04
%
Dividend yield
   
1.50
%
   
1.50
%
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   
December 31, 2016
   
December 31, 2015
 
   
Number of
Shares
   
Average
Exercise
Price
   
Number of
Shares
   
Average
Exercise
Price
 
Options:
                               
Outstanding, beginning of year
   
175,550
    $
8.17
     
83,400
    $
8.09
 
Granted
   
97,000
     
8.30
     
96,150
     
8.23
 
Exercised
   
     
     
     
 
Expired
   
     
     
     
 
Forfeited
   
     
     
4,000
     
8.08
 
Options outstanding, end of year
   
272,550
    $
8.21
     
175,550
    $
8.17
 
Options exercisable, end of year
   
175,550
    $
8.17
     
80,400
    $
8.09