Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Contributions to Revenue and Receivables by Payor (Details)

v3.21.2
Basis of Presentation and Summary of Significant Accounting Policies - Contributions to Revenue and Receivables by Payor (Details) - Customer Concentration Risk
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Net Revenue | Payor A          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk 12.50% 11.90% 12.60% 11.90%  
Net Revenue | Payor B          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk 10.30% 10.30% 10.40% 10.30%  
Net Revenue | Payor C          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk 16.70% 17.50% 16.80% 17.50%  
Net Revenue | Payor D          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk   12.40%   12.90%  
Net Revenue | Payor E          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk   10.10%   10.30%  
Receivables and Receivables-Related Parties | Payor C          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk     11.50%    
Receivables and Receivables-Related Parties | Payor F          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk     41.10%   43.90%
Receivables and Receivables-Related Parties | Payor G          
Accounts Receivable And Net Revenue [Line Items]          
Concentration risk     34.40%   36.50%