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Note D - Other Comprehensive Loss (Tables)
 12 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Year Ended June 30, 201
8
  
   
Defined Benefit
Pension Plan
    
Unrealized
(Losses)
Gains
on
Cash Flow
Hedges
    
Total
  
                         
Balance as of June 30, 2017
   $
(491
 )   $
(414
 )   $
(905
 )
                         
OCI/OCL before reclassifications
    
69
      
(1,370
 )    
(1,301
 )
Amounts reclassified from OCI
    
80
      
1,689
      
1,769
  
                         
Tax effect of OCI activity
    
(45
 )    
(96
 )    
(141
 )
Net current period OCI/OCL
    
104
      
223
      
327
  
Balance as of June 30, 2018
   $
(387
 )   $
(191
 )   $
(578
 )
   
Year
Ended June 30, 201
7
  
   
Defined Benefit
Pension Plan
    
Unrealized
Gains
(Losses)
on Cash
Flow Hedges
    
Total
  
                         
Balance as of June 30, 2016
   $
(775
 )   $
95
     $
(680
 )
                         
OCI/OCL before reclassifications
    
271
      
(110
 )    
161
  
Amounts reclassified from OCI
    
175
      
(685
 )    
(510
 )
                         
Tax effect of OCI activity
    
(162
 )    
286
      
124
  
Net current period OCI/OCL
    
284
      
(509
 )    
(225
 )
Balance as of June 30, 2017
   $
(491
 )   $
(414
 )   $
(905
 )