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Revenue - Additional Information (Details) - Revenue from Contract with Customer - Product Concentration Risk
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Transferred at Point in Time        
Disaggregation of Revenue [Line Items]        
Revenue from products and services transferred to customers 95.00% 95.00% 95.00% 95.00%
Transferred over Time        
Disaggregation of Revenue [Line Items]        
Revenue from products and services transferred to customers 5.00% 5.00% 5.00% 5.00%