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SEGMENT INFORMATION (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
segment
Sep. 30, 2013
Dec. 31, 2013
SEGMENT INFORMATION          
Number of operating segments     1    
Segment information          
Revenues $ 65,280 $ 24,876 $ 187,784 $ 75,371  
Identifiable assets 173,315   173,315   170,977
Total Revenue | Customer
         
Segment information          
Number of customers 3   3    
Percentage of concentration risk 38.00%   35.00%    
Trade receivables | Credit Concentration Risk
         
Segment information          
Number of customers 3        
Percentage of concentration risk 46.00%        
Outside the United States
         
Segment information          
Revenues 20,735 11,491 64,650 35,504  
Wholly owned foreign subsidiaries
         
Segment information          
Revenues 19,489 11,167 59,653 33,934  
Identifiable assets $ 58,488 $ 31,480 $ 58,488 $ 31,480