Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Schedule of Client Revenue Concentration (Details)

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COMMITMENTS AND CONTINGENCIES - Schedule of Client Revenue Concentration (Details)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Customer Concentration Risk | Revenue | North America | Client A    
Product Information [Line Items]    
Concentration Risk 11.30% 14.60%