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Description of the Business and Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - Trade and Other Receivables - Customer Concentration Risk
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Customer A    
Concentration Risk [Line Items]    
Concentration risk, percentage 44.00% 10.00%
Customer B    
Concentration Risk [Line Items]    
Concentration risk, percentage   27.00%