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Note 10 - Other Income and (Expense) (Tables)
 12 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
   
201
9
    
201
8
    
201
7
  
Interest income
   $
71
      
128
     $
399
  
Interest expense
    
(976
)
    
(845
)
    
(674
)
Foreign currency gain (loss), net
    
(426
)
    
(316
)
    
(86
)
(Loss) from equity investment
    
-
      
-
      
(307
)
Brazil tax settlements
    
345
      
1,446
      
-
  
Patent lawsuit settlement
    
-
      
(666
 )    
(100
)
Sale of scrap material
    
110
      
70
      
71
  
Pension net periodic benefit cost (NPBC)
    
(930
)
    
(794
)
    
(897
)
Other income (expense), net
    
195
      
324
      
190
  
    $
(1,611
)
    
(653
)
   $
(1,404
)