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Description of Business - Additional Information (Details) - Segment
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Significant Accounting Policies [Line Items]    
Number of operating segments 1  
Sales Revenue, Net | Customer Concentration Risk | Customers Located Outside Of United States    
Significant Accounting Policies [Line Items]    
Sales revenue percentage 18.00% 11.00%