Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Basis of Presentation and Significant Accounting Policies - Concentration of Credit Risk and Significant Customers (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
Customer A | REVENUES          
Concentration Risk [Line Items]          
Concentration risk, percentage 0.00% 0.00% 0.00% 0.00%  
Customer A | ACCOUNTS RECEIVABLE          
Concentration Risk [Line Items]          
Concentration risk, percentage     82.00%   71.00%
Customer B | REVENUES          
Concentration Risk [Line Items]          
Concentration risk, percentage 0.00% 15.00% 10.00% 18.00%  
Customer B | ACCOUNTS RECEIVABLE          
Concentration Risk [Line Items]          
Concentration risk, percentage     0.00%   9.00%
Customer C | REVENUES          
Concentration Risk [Line Items]          
Concentration risk, percentage 24.00% 0.00% 8.00% 0.00%  
Customer C | ACCOUNTS RECEIVABLE          
Concentration Risk [Line Items]          
Concentration risk, percentage     3.00%   0.00%
Customer D | REVENUES          
Concentration Risk [Line Items]          
Concentration risk, percentage 7.00% 8.00% 9.00% 10.00%  
Customer D | ACCOUNTS RECEIVABLE          
Concentration Risk [Line Items]          
Concentration risk, percentage     1.00%   2.00%