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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2020 USD ($) segment unit | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
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 | $ 209,300,000 |  |  |
Amount of short-term marketable securities | $ 117,075,000 |  | $ 116,539,000 |
Risk pool surplus or deficits, settlement period after risk pool performance year | 18 months |  |  |
Allowance for doubtful accounts | $ 2,900,000 |  | 2,900,000 |
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 |  |
Contract liabilities | 664,000 |  | $ 8,892,000 |
Payments received | 7,500,000 |  |  |
Accrued contract liability recognized | 21,900,000 |  |  |
Investment deposit | $ 4,000,000 |  |  |
Voting rights held (more than) | 50.00% |  |  |
Other Receivables, Final Settlement 2017 Performance Year |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Recoverable claims paid |  |  |  | $ 3,200,000
Accounts Payable and Accrued Expenses |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Payments received | $ 22,600,000 |  |  |
Accrued contract liability recognized | 400,000 |  |  |
Contract liability repaid, capitation received and not earned | 8,500,000 |  |  |
Other Receivables |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Recoverable claims paid | $ 8,500,000 |  |  |
CMS |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Expected period of payment upon termination of agreement | 30 days |  |  |
PMPM Managed Care Contract |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Contract term | P1Y |  |  |
Management Fee Income Contract |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Contract term | P10Y |  |  |
Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Marketable Securities, Current, Maturity Period | 4 months |  |  |
Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Marketable Securities, Current, Maturity Period | 24 months |  |  |
Certificates of Deposit |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Amount of short-term marketable securities | $ 117,000,000 |  |  |

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