Discontinued Operations - Summary of Current and Long-term Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Total current assets	$ 0	$ 33,914
Current liabilities:
Current liabilities of discontinued operations	$ 0	27,986
True Health | Discontinued Operations, Disposed of by Sale
Current assets:
Cash and cash equivalents		21,488
Restricted cash and restricted investments		63
Accounts receivable, net		3,437
Prepaid expenses and other current assets		5,198
Investments, at amortized cost		3,728
Total current assets		33,914
Restricted cash and restricted investments		616
Investments, at amortized cost		10,919
Prepaid expenses and other noncurrent assets		59
Intangible assets, net		3,080
Goodwill		5,705
Total assets		54,293
Current liabilities:
Accounts payable		93
Accrued liabilities		11,265
Accrued compensation and employee benefits		1,115
Deferred revenue		4,140
Reserve for claims and performance-based arrangements		9,858
Current liabilities of discontinued operations		26,471
Other long-term liabilities		128
Deferred tax liabilities, net		49
Total liabilities		26,648
True Health | Discontinued Operations, Disposed of by Sale | Services Agreements
Current assets:
Accounts receivable, net		1,500
Current liabilities:
Accounts payable		$ 1,500