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Note 2 - Inventories (Tables)
3 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
September 30,
   
June 30,
 
   
2018
   
2018
 
                 
Raw materials
  $
6,409
    $
4,179
 
Work-in-process
   
2,131
     
2,207
 
Finished goods
   
1,060
     
1,355
 
Total
  $
9,600
    $
7,741