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Note 15 - Comprehensive Income (Loss) (Tables)
9 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
March 31,
2019
   
June 30,
2018
 
Foreign currency translation adjustment
  $
(30,266
)   $
(25,013
)
Unrealized pension losses, net of tax
   
(92,357
)    
(95,112
)
Unrealized losses on derivative instruments, net of tax
   
(1,794
)    
(1,734
)
Total
  $
(124,417
)   $
(121,859
)