Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies - Concentration of Risk (Details)

v3.21.2
Basis of Presentation and Significant Accounting Policies - Concentration of Risk (Details) - customer
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Customer Concentration Risk [Member] | Revenues [Member]          
Concentration of Risk          
Number of major partners 2 2 3 3  
Customer Concentration Risk [Member] | Revenues [Member] | Partner 1 [Member]          
Concentration of Risk          
Concentration risk (as a percent) 53.00% 64.00% 51.00% 58.00%  
Customer Concentration Risk [Member] | Revenues [Member] | Partner 2 [Member]          
Concentration of Risk          
Concentration risk (as a percent) 41.00% 36.00% 23.00% 28.00%  
Customer Concentration Risk [Member] | Revenues [Member] | Partner 3 [Member]          
Concentration of Risk          
Concentration risk (as a percent)     23.00% 11.00%  
Credit Concentration Risk | Trade Receivables [Member] | Partner 1 [Member]          
Concentration of Risk          
Number of major partners     1   1
Concentration risk (as a percent)     100.00%   100.00%