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Summary of Significant Accounting Policies - Concentrations of Credit and Other Risks (Details) - Customer Concentration Risk - Major Customer
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Revenue        
Concentration Risk [Line Items]        
Concentration risk percentage 15.00% 13.00% 15.00% 14.00%
Accounts Receivable        
Concentration Risk [Line Items]        
Concentration risk percentage     10.00%