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Note 10 - Retirement Benefits (Tables)
 6 Months Ended
Dec. 31, 2017
Pension Plan [Member]  
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
U.S. Plans
    
Non-U.S. Plans
  
   
Three Months Ended
    
Three Months Ended
  
   
December 31
,
    
December 31
,
  
   
201
7
    
201
6
    
201
7
    
201
6
  
Service cost
   $
1
     $
1
     $
9
     $
9
  
Interest cost
    
2,520
      
2,613
      
259
      
250
  
Expected return on plan assets
    
(3,354
 )    
(3,440
 )    
(235
 )    
(282
 )
Recognized net actuarial loss
    
1,145
      
1,190
      
234
      
249
  
Amortization of prior service cost
    
-
      
-
      
(9
 )    
(12
 )
Net periodic benefit cost
   $
312
     $
364
     $
258
     $
214
  
   
U.S. Plans
    
Non-U.S. Plans
  
   
Six Months Ended
    
Six Months Ended
  
   
December 31,
    
December 31,
  
   
2017
    
2016
    
2017
    
2016
  
Service cost
   $
2
     $
2
     $
18
     $
19
  
Interest cost
    
5,040
      
5,226
      
514
      
514
  
Expected return on plan assets
    
(6,707
 )    
(6,881
 )    
(466
 )    
(579
 )
Recognized net actuarial loss
    
2,290
      
2,381
      
463
      
511
  
Amortization of prior service cost
    
-
      
-
      
(17
 )    
(24
 )
Net periodic benefit cost
   $
625
     $
728
     $
512
     $
441