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4. INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2015
Inventory Disclosure [Abstract]  
Inventories
   June 30, 2015   December 31, 2014 
Finished goods  $12,508   $11,118 
Raw materials   1,854    2,695 
Work in progress   3,087    3,274 
Other   1,422    1,463 
Total  $18,871   $18,550