Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting - Narrative (Details)

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Segment Reporting - Narrative (Details)
6 Months Ended
Jun. 30, 2024
segment
clinic
Mar. 31, 2024
clinic
Dec. 31, 2023
clinic
Jun. 30, 2023
clinic
Mar. 31, 2023
clinic
Dec. 31, 2022
clinic
Segment Reporting Information [Line Items]            
Number of operating segments | segment 2          
Number of non-operating segments | segment 1          
Number of clinics 960     890    
Company-Owned or Managed Clinics            
Segment Reporting Information [Line Items]            
Number of clinics 131 135 135 134 130 126
Franchised Clinics            
Segment Reporting Information [Line Items]            
Number of clinics 829 819 800 756 740 712