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Inventories, Net (Tables)
6 Months Ended
Jun. 30, 2016
Inventory Disclosure [Abstract]  
Schedule of Inventory

Inventories are comprised of the following:

 

    June 30, 2016     December 31, 2015  
Raw materials   $ 45,332     $ 36,254  
Work in process     6,223       3,451  
Finished goods     3,188       2,875  
Stores and spares     4,319       3,190  
Packing material     234       241  
    $ 59,296     $ 46,011