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Note D - Other Comprehensive Loss (Tables)
 3 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Defined
Benefit
Pension Plan
    
Unrealized
Gains
(Losses)
on Cash Flow
Hedges
    
Total
  
                         
Balance as of June 30,
2017
   $
(491
 )   $
(414
 )   $
(905
 )
                         
OCI/OCL
before reclassifications
    
—
      
(1,953
 )    
(1,953
 )
Amounts reclassified from OCI
    
—
      
178
      
178
  
                         
Tax effect of OCI activity
    
—
      
641
      
641
  
Net current period OCI/OCL
    
—
      
(1,134
 )    
(1,134
 )
Balance as of September 30,
2017
   $
(491
 )   $
(1,548
 )   $
(2,039
 )
                         
                         
Balance as of June 30, 201
6
   $
(775
 )   $
95
     $
(680
 )
                         
OCI/OCL
before reclassifications
    
—
      
(452
 )    
(452
 )
Amounts reclassified from OCI
    
—
      
(158
 )    
(158
 )
                         
Tax effect of OCI
activity
    
—
      
220
      
220
  
Net current period OCI/OCL
    
—
      
(390
 )    
(390
 )
Balance as of September 30, 201
6
   $
(775
 )   $
(295
 )   $
(1,070
 )