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Business and Significant Accounting Policies - Additional Information (Details) - Customer
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
ASU 2016-13          
Business And Significant Accounting Policies [Line Items]          
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true   true    
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jan. 01, 2020   Jan. 01, 2020    
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true   true    
ASU 2018-15          
Business And Significant Accounting Policies [Line Items]          
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true   true    
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jan. 01, 2020   Jan. 01, 2020    
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true   true    
ASU 2020-04          
Business And Significant Accounting Policies [Line Items]          
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true   true    
Change in Accounting Principle, Accounting Standards Update, Adoption Date Mar. 12, 2020   Mar. 12, 2020    
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true   true    
Accounts Receivables | Customer Concentration Risk          
Business And Significant Accounting Policies [Line Items]          
Concentration risk, percentage         10.00%
Number of customers     1   1
Revenues | Customer Concentration Risk          
Business And Significant Accounting Policies [Line Items]          
Concentration risk, percentage 10.00% 10.00% 10.00% 10.00%  
Number of customers 2 2 2 2  
Minimum          
Business And Significant Accounting Policies [Line Items]          
Collection period for trade accounts receivable     30 days    
Maximum          
Business And Significant Accounting Policies [Line Items]          
Collection period for trade accounts receivable     60 days