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Note H - Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
Six Months Ended
  
   
June 30,
    
June 30,
  
   
2017
    
2016
    
2017
    
2016
  
   
(in thousands, except per share data)
  
                                 
Net income
   $
1,609
     $
3,992
     $
3,892
     $
6,927
  
                                 
Basic weighted average common shares outstanding
    
6,381
      
6,551
      
6,390
      
6,836
  
Dilutive effect of common stock equivalents
    
49
      
21
      
22
      
22
  
Diluted weighted average common shares outstanding
    
6,430
      
6,572
      
6,412
      
6,858
  
                                 
Basic earnings per share
   $
0.25
     $
0.61
     $
0.61
     $
1.01
  
Diluted earnings per share
   $
0.25
     $
0.61
     $
0.61
     $
1.01