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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
   September 30,
2019
   December 31, 2018 
Raw materials  $769,294   $1,207,334 
Work-in-process   379,747    872,376 
Finished goods   5,546,795    5,547,301 
    6,695,836    7,627,011 
Less: inventory reserve   (4,643,524)   (1,212,706)
   $2,052,312   $6,414,305