Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)	1 Months Ended	3 Months Ended
	Apr. 30, 2020 USD ($)	Mar. 31, 2021 USD ($) segment unit	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment		1
Number of reportable segments | segment		1
Amount deposit accounts exceeded FDIC insured limit		$ 295,700,000
Amount of short-term marketable securities		$ 66,931,000		$ 67,695,000
Risk pool surplus or deficits, settlement period after risk pool performance year		18 months
Impairment of finite-lived intangible assets		$ 0	$ 0
Impairment of long-lived assets		$ 0	0
Number of main reporting units | unit		3
Impairment of goodwill		$ 0	0
Impairment of indefinite-lived intangible assets		0	$ 0
Goodwill		239,053,000		239,053,000
Fiduciary accounts payable		6,871,000		9,642,000
Payments received, monthly		8,000,000.0
Payments received		23,900,000
Payments received, revenue		17,200,000
Contract liabilities		$ 19,275,000		12,988,000
Voting rights held (more than)		50.00%
Universal Care Acquisition Partners, LLC | Universal Care, Inc.
Summary Of Significant Accounting Policies [Line Items]
Ownership interest disposed	48.90%
Contingent consideration, cash held in escrow	$ 15,600,000
Contingent consideration, preferred shares	6,400,000
Contingent consideration, fair value	22,000,000.0
APC | Universal Care, Inc.
Summary Of Significant Accounting Policies [Line Items]
Additional cash consideration entitled to be received	$ 15,700,000
Universal Care Acquisition Partners, LLC | APC
Summary Of Significant Accounting Policies [Line Items]
Ownership interest	100.00%
Accounts Payable and Accrued Expenses
Summary Of Significant Accounting Policies [Line Items]
Accrued contract liability recognized		$ 400,000
PMPM Managed Care Contract
Summary Of Significant Accounting Policies [Line Items]
Contract term		one year
Management Fee Income Contract
Summary Of Significant Accounting Policies [Line Items]
Contract term		10 years
CMS
Summary Of Significant Accounting Policies [Line Items]
Expected period of payment upon termination of agreement		30 days
Minimum
Summary Of Significant Accounting Policies [Line Items]
Short-term marketable securities, maturity period		4 months
Maximum
Summary Of Significant Accounting Policies [Line Items]
Short-term marketable securities, maturity period		24 months
Certificates of Deposit
Summary Of Significant Accounting Policies [Line Items]
Amount deposit accounts exceeded FDIC insured limit				$ 294,900,000