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Inventories (Tables)
3 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
  September 30,
2019
   June 30,
2019
 
Raw materials  $777,744   $974,639 
Work-in-process   540,057    651,769 
Finished goods   1,753,374    1,533,318 
Less: inventory reserve for raw materials   (1,082,425)   (944,167)
Total  $1,988,750   $2,215,559