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7. Earnings per Common Share (Tables)
 6 Months Ended
Jun. 30, 2016
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Earnings per share for the periods indicated were as follows (in thousands, except per share amounts):

   
Three Months Ended
    
Six Months Ended
  
   
June 30,
    
June 30,
  
   
2016
    
2015
    
2016
    
2015
  
Net income
  
$
954
    
$
1,325
    
$
1,361
    
$
2,140
  
                                 
Weighted average shares outstanding - basic
    
21,105
      
20,804
      
21,056
      
20,726
  
Stock options
    
584
      
520
      
599
      
475
  
Weighted average shares outstanding - diluted
    
21,689
      
21,324
      
21,655
      
21,201
  
                                 
Net income per common share - basic
  
$
0.05
    
$
0.06
    
$
0.07
    
$
0.10
  
Net income per common share - diluted
  
$
0.04
    
$
0.06
    
$
0.06
    
$
0.10