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Significant Risks and Uncertainties Including Business and Credit Concentrations - Additional Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]      
Debt forgiveness     $ 5,142
2021 Acquisitions      
Debt Instrument [Line Items]      
Current portion of long term debt     $ 332
Centers for Medicare and Medicaid Services      
Debt Instrument [Line Items]      
Maximum percentage of accelerated payment amount 1    
Proceeds from unsecured loan $ (2,727)    
1% Paycheck Protection Program Loan, due May 13, 2022      
Debt Instrument [Line Items]      
Proceeds from unsecured loan (4,993)    
1% Paycheck Protection Program Loan, due May 13, 2022 | Series of Individually Immaterial Business Acquisitions      
Debt Instrument [Line Items]      
Proceeds from unsecured loan (332)    
Paycheck Protection Program Loan due October 2026 | Notes Payable to Banks      
Debt Instrument [Line Items]      
Debt forgiveness 183    
Provider Relief Funding      
Debt Instrument [Line Items]      
Proceeds from unsecured loan $ 0 $ (1,023)