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Discontinued Operations - Summary of Cash Flows (Details) - True Health - Discontinued Operations, Disposed of by Sale - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash flows provided by (used in) operating activities $ 5,002 $ 7,920
Cash flows provided by (used in) investing activities $ (2,494) $ 936