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2. INVENTORIES
6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
2. INVENTORIES

Inventories consist of:

 

    June 30,
2017
  December 31,
2016
         
Raw materials   $ 617,048     $ 818,500  
Finished goods     3,421,363       4,370,331  
Work-in-process     804,153       692,850  
    $ 4,842,564     $ 5,881,681