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Inventories (Tables)
12 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventory balances
    June 30,  
    2020     2019  
Raw materials   $ 397,000     $ 117,000  
Finished goods, net     9,603,000       1,323,000  
    $ 10,000,000     $ 1,440,000