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SEGMENT INFORMATION - Narrative (Details) - product
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Disaggregation of Revenue [Line Items]    
Number of products represented of total revenue 10 10
Product Concentration Risk | Revenues    
Disaggregation of Revenue [Line Items]    
Concentration risk percentage 38.00% 36.00%