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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
   June 30,
2019
   December 31,
2018
 
Raw materials  $675,600   $1,207,334 
Work-in-process   512,377    872,376 
Finished goods   5,581,527    5,547,301 
    6,769,504    7,627,011 
Less: inventory reserve   (4,821,759)   (1,212,706)
   $1,947,745   $6,414,305