Basis of Presentation and Summary of Significant Accounting Policies - Contributions to Revenue and Receivables by Payor (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Net Revenue | Payor A
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	12.10%	17.40%
Net Revenue | Payor B
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	10.30%	15.30%
Net Revenue | Payor C
Accounts Receivable And Net Revenue [Line Items]
Concentration risk		12.00%
Net Revenue | Payor D
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	17.60%
Net Revenue | Payor E
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	13.30%
Accounts Receivable | Payor D
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	13.60%
Accounts Receivable | Payor F
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	33.50%		30.40%
Accounts Receivable | Payor G
Accounts Receivable And Net Revenue [Line Items]
Concentration risk	33.60%		36.00%