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Note 4 - Inventories (Tables)
6 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
As of
   
As of
 
   
December 31,
   
June 30,
 
   
2020
   
2020
 
Raw materials
  $
590,000
    $
397,000
 
Finished goods, net
   
5,981,000
     
9,603,000
 
    $
6,571,000
    $
10,000,000