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Note 3 - Inventories (Tables)
12 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
June 30,
 
   
2020
   
2019
 
                 
Raw materials
  $
6,610
    $
4,550
 
Work-in-process
   
2,612
     
2,325
 
Finished goods
   
879
     
1,944
 
Total
  $
10,101
    $
8,819