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Inventory (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventory
   As of
September 30, 2019
   As of
December 31, 2018
 
Raw materials  $686,740   $338,991 
Work-in-process   1,137,997    1,337,035 
Finished goods   856,336    655,645 
Total  $2,681,073   $2,331,671