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3. INVENTORIES
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
3. INVENTORIES

Inventories consist of:

 

    As of December 31,
    2017   2016
         
Raw materials   $ 396,482     $ 818,500  
Finished goods     844,224       4,370,331  
Work-in-process           692,850  
Allowance for obsolete and slow-moving inventories     (43,921 )      
    $ 1,196,785     $ 5,881,681