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Summary of Significant Accounting Policies - Concentration Risk (Details)
12 Months Ended
Dec. 31, 2020
Concentration Risk [Line Items]  
Expected life of customer arrangement 2 years 6 months
Customer Concentration Risk | Sales  
Concentration Risk [Line Items]  
Concentration risk percent (more than) 10.00%
Customer Concentration Risk | Accounts Receivable  
Concentration Risk [Line Items]  
Concentration risk percent (more than) 10.00%