Annual report pursuant to Section 13 and 15(d)

Segment Reporting - Narrative (Details)

v3.22.0.1
Segment Reporting - Narrative (Details)
12 Months Ended
Dec. 31, 2021
clinic
segment
Dec. 31, 2020
clinic
Dec. 31, 2019
clinic
Segment Reporting Information [Line Items]      
Number of operating segments | segment 2    
Number of stores 706 579  
Entity Operated Units      
Segment Reporting Information [Line Items]      
Number of stores 96 64 60
Franchised Units      
Segment Reporting Information [Line Items]      
Number of stores 610 515 453