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Industry and Geographic Information - Sales to Individual Customers in Excess of 10% of Total Revenues (Details) - Sales - Customer Concentration Risk
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Revenue, Major Customer [Line Items]    
Sales percentage 63.00% 51.00%
Customer One [Member]    
Revenue, Major Customer [Line Items]    
Sales percentage 25.00% 13.00%
Customer B    
Revenue, Major Customer [Line Items]    
Sales percentage 18.00% 17.00%
Customer C    
Revenue, Major Customer [Line Items]    
Sales percentage 11.00% 6.00%
Customer D    
Revenue, Major Customer [Line Items]    
Sales percentage 9.00% 15.00%