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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
    
Nine Months Ended
  
   
March 31,
    
March 31,
  
   
20
20
    
201
9
    
2020
    
2019
  
Numerator
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Net (loss) income
   $
(4,015
)
   $
1,994
     $
(3,443
)
   $
6,734
  
                                 
Denominator
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Basic weighted average common shares outstanding
    
6,565
      
6,800
      
6,734
      
6,791
  
Dilutive effect of stock options and restricted stock
    
—
      
595
      
—
      
329
  
Diluted weighted average common shares outstanding
    
6,565
      
7,395
      
6,734
      
7,120
  
                                 
Basic net (loss) income per common share
   $
(0.61
)
   $
0.29
     $
(0.51
)
   $
0.99
  
                                 
Diluted net (loss) income per common share
   $
(0.61
)
   $
0.27
     $
(0.51
)
   $
0.95