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Inventories (Tables)
3 Months Ended
Mar. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consist of the following:

 

    March 31, 2018     December 31, 2017  
Raw materials   $ 4,666,678     $ 3,755,477  
Finished goods     639,275       295,805  
Total inventories   $ 5,305,953     $ 4,051,282