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Note 7 - Warranties (Tables)
 9 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   
March 31,
2018
    
June 30,
201
7
  
Balance at beginning of year
   $
9,243
     $
9,085
  
Acquisitions and other
    
(20
 )    
301
  
Warranty expense
    
6,872
      
9,203
  
Warranty claims
    
(6,762
 )    
(9,346
 )
Balance at end of period
   $
9,333
     $
9,243