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Inventory (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of inventory
   As of
March 31, 2020
   As of
December 31, 2019
 
Raw materials  $590,720   $791,558 
Work-in-process   844,889    1,207,457 
Finished goods   162,349    519,241 
Total  $1,597,958   $2,518,256