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Organization, Description of Business and Summary of Significant Accounting Policies - Schedule of Third-party Payers And Other Customers (Details) - Customer concentration risk	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Revenue | Medicare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk	31.00%	31.00%	31.00%	31.00%
Revenue | UnitedHealthcare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk	10.00%	9.00%	10.00%	10.00%
Revenue | Customers Representing >10% Of Total Revenue
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk	41.00%	40.00%	41.00%	41.00%
Accounts receivable | Medicare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk			14.00%		12.00%
Accounts receivable | UnitedHealthcare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk			10.00%		9.00%

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