Quarterly report pursuant to Section 13 or 15(d)

Supplemental Balance Sheet and Cash Flow Information - Changes in Operating Assets and Liabilities (Details)

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Supplemental Balance Sheet and Cash Flow Information - Changes in Operating Assets and Liabilities (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Accounts receivable $ 732 $ (4,428)
Center operating supplies and inventories (355) (577)
Prepaid expenses and other current assets (14,664) (8,268)
Income tax receivable 2,349 748
Other assets 5 82
Accounts payable (12,050) (8,921)
Accrued expenses and other current liabilities (4,192) (8,353)
Deferred revenue 3,756 5,920
Other liabilities 599 147
Changes in operating assets and liabilities $ (23,820) $ (23,650)