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Note 2 - Inventories (Tables)
9 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
March 31,
   
June 30,
 
   
2020
   
2019
 
                 
Raw materials
  $
7,185
    $
4,550
 
Work-in-process
   
1,555
     
2,325
 
Finished goods
   
1,326
     
1,944
 
Total
  $
10,066
    $
8,819