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

Inventories are comprised of the following:

 

    March 31, 2018     December 31, 2017  
Raw material   $ 973,923     $ 1,040,795  
Work in progress     135,487       77,702  
Finished goods     53,052       78,316  
    $ 1,162,462     $ 1,196,813