Basis of Presentation and Summary of Significant Accounting Policies - Contributions to Revenue and Receivables by Payor (Details)	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020
Net Revenue | Payor A
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	12.80%	12.10%
Net Revenue | Payor B
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	10.50%	10.30%
Net Revenue | Payor C
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	16.90%	17.60%
Net Revenue | Payor D
Accounts Receivable And Net Revenue [Line Items]
Concentration risk		13.30%
Receivables and Receivables-Related Parties | Payor C
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	11.90%
Receivables and Receivables-Related Parties | Payor E
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	42.80%		43.90%
Receivables and Receivables-Related Parties | Payor F
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	32.30%		36.50%