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Note 2 - Inventories (Tables)
9 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
March 31,
   
June 30,
 
   
2019
   
2018
 
                 
Raw materials
  $
6,881
    $
4,179
 
Work-in-process
   
2,218
     
2,207
 
Finished goods
   
1,450
     
1,355
 
Total
  $
10,549
    $
7,741