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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		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenue | Medicare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk	30.00%	27.00%
Revenue | UnitedHealthcare
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk	9.00%	11.00%
Revenue | Customers Representing >10% Of Total Revenue
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk	39.00%	38.00%
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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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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