Accrued Expenses and Other Current Liabilities and Other Liabilities - Accrued expenses and other current liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Patient prepayments, deposits, and refunds payable	$ 26,475	$ 27,195
Insurance and self-insurance accruals	8,943	7,651
Accrued sales taxes and other taxes	7,803	9,863
Derivative liability	6,425	7,686
Accrued professional fees	750	1,016
Accrued interest payable	707	440
Other current liabilities	9,296	9,010
Total	$ 60,399	$ 62,861