Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Concentration of Credit Risk and Other Risks and Uncertainties (Details)

v3.21.2
Summary of Significant Accounting Policies - Concentration of Credit Risk and Other Risks and Uncertainties (Details) - Customer Concentration Risk
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Total Revenue | Customer 1          
Concentration Risk [Line Items]          
Concentration risk, percentage 53.90% 10.00% 31.40%    
Total Revenue | Customer 2          
Concentration Risk [Line Items]          
Concentration risk, percentage 17.20% 0.00%   0.00%  
Total Revenue | Customer 3          
Concentration Risk [Line Items]          
Concentration risk, percentage 15.10% 0.00% 16.60% 0.00%  
Total Revenue | Customer 4          
Concentration Risk [Line Items]          
Concentration risk, percentage   17.70% 11.50% 58.50%  
Total Revenue | Customer 5          
Concentration Risk [Line Items]          
Concentration risk, percentage     10.80% 13.30%  
Total Revenue | Customer 6          
Concentration Risk [Line Items]          
Concentration risk, percentage       13.10%  
Total Revenue | Customer 7          
Concentration Risk [Line Items]          
Concentration risk, percentage       10.80%  
Accounts Receivable | Customer 2          
Concentration Risk [Line Items]          
Concentration risk, percentage         0.00%
Accounts Receivable | Customer 3          
Concentration Risk [Line Items]          
Concentration risk, percentage         0.00%
Accounts Receivable | Customer 4          
Concentration Risk [Line Items]          
Concentration risk, percentage     55.00%   85.60%
Accounts Receivable | Customer 5          
Concentration Risk [Line Items]          
Concentration risk, percentage         0.00%
Accounts Receivable | Customer 6          
Concentration Risk [Line Items]          
Concentration risk, percentage     0.00%    
Accounts Receivable | Customer 8          
Concentration Risk [Line Items]          
Concentration risk, percentage     17.40%   0.00%