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SEGMENT INFORMATION (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
segment
customer
Mar. 31, 2015
USD ($)
customer
Dec. 31, 2015
USD ($)
customer
Segment information      
Number of operating segments | segment 1    
Revenues $ 63,675 $ 59,580  
Identifiable assets $ 186,418   $ 164,698
Sales      
Segment information      
Number of customers | customer 1 1  
Sales | Customer A      
Segment information      
Percentage of concentration risk 18.00% 23.00%  
Trade receivables.      
Segment information      
Number of customers | customer 2   2
Trade receivables. | Customer A      
Segment information      
Percentage of concentration risk 16.00%   12.00%
Trade receivables. | Customer B      
Segment information      
Percentage of concentration risk 15.00%   15.00%
Outside the United States      
Segment information      
Revenues $ 28,575 $ 19,814  
Wholly owned foreign subsidiaries      
Segment information      
Revenues 25,607 $ 17,427  
Identifiable assets $ 81,408   $ 56,444