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)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2020
customer
Jun. 30, 2021
USD ($)
customer
Jun. 30, 2020
customer
Jun. 30, 2021
USD ($)
customer
Jun. 30, 2020
customer
Concentration of Risk          
Trade receivable, net | $   $ 0.0   $ 0.0  
Customer Concentration Risk | Revenues          
Concentration of Risk          
Number of major partners   2 1 2 2
Customer Concentration Risk | Revenues | Partner 1          
Concentration of Risk          
Concentration risk (as a percent)   55.00% 88.00% 57.00% 56.00%
Customer Concentration Risk | Revenues | Partner 2          
Concentration of Risk          
Concentration risk (as a percent)   42.00%   39.00% 40.00%
Credit Concentration Risk | Trade Receivables | Partner 1          
Concentration of Risk          
Number of major partners 1        
Concentration risk (as a percent) 100.00%