Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting - Narrative (Details)

v3.23.3
Segment Reporting - Narrative (Details)
9 Months Ended
Sep. 30, 2023
clinic
segment
Jun. 30, 2023
clinic
Dec. 31, 2022
clinic
Sep. 30, 2022
clinic
Jun. 30, 2022
clinic
Dec. 31, 2021
clinic
Segment Reporting Information [Line Items]            
Number of operating segments | segment 2          
Number of non-operating segments | segment 1          
Number of stores 914     805    
Company-Owned or Managed Clinics            
Segment Reporting Information [Line Items]            
Number of stores 136 134 126 115 107 96
Franchised Clinics            
Segment Reporting Information [Line Items]            
Number of stores 778 756 712 690 662 610