Credit Risk Concentrations (Details)	9 Months Ended	12 Months Ended
Sep. 30, 2021	Dec. 31, 2020
Medicare Receivable \| Credit Concentration Risk \| Accounts Receivable
Concentration Risk [Line Items]
Percentage of concentration risk	12.00%	18.00%

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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