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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
  
   
September 30,
  
   
2020
    
201
9
  
Numerator
  
 
 
 
  
 
 
 
Net income
   $
2,258
     $
96
  
                 
Denominator
  
 
 
 
  
 
 
 
Basic weighted average common shares outstanding
    
6,418
      
6,841
  
Dilutive effect of stock options and restricted stock
    
53
      
144
  
Diluted weighted average common shares outstanding
    
6,471
      
6,985
  
                 
Basic net income per common share
   $
0.35
     $
0.01
  
                 
Diluted net income per common share
   $
0.35
     $
0.01