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Summary of Significant Accounting Policies - Summary of Concentration Risk (Details) - Customer Concentration Risk
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Service revenue percentage | Customer A      
Concentration Risk [Line Items]      
Concentration risk 24.00% 29.00%  
Service revenue percentage | Customer B      
Concentration Risk [Line Items]      
Concentration risk 10.00% 11.00%  
Accounts receivable percentage | Customer A      
Concentration Risk [Line Items]      
Concentration risk 18.00%   22.00%
Accounts receivable percentage | Customer B      
Concentration Risk [Line Items]      
Concentration risk     12.00%
Accounts receivable percentage | Customer C      
Concentration Risk [Line Items]      
Concentration risk 12.00%