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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
Six Months Ended
  
 
  
December 31,
    
December 31,
  
 
  
2016
    
2015
    
2016
    
2015
  
Numerator
                                
Net Income
   $
2,466
     $
1,868
     $
4,956
     $
3,081
  
                                 
Denominator
                                
Basic weighted average common shares outstanding
    
6,567
      
6,510
      
6,563
      
6,515
  
Dilutive effect of stock options
    
116
      
119
      
102
      
147
  
Diluted weighted average common shares outstanding
    
6,683
      
6,629
      
6,665
      
6,662
  
                                 
Basic net income per common share
   $
0.38
     $
0.29
     $
0.76
     $
0.47
  
                                 
Diluted net income per common share
   $
0.37
     $
0.28
     $
0.74
     $
0.46