Quarterly report [Sections 13 or 15(d)]

Nature of Operations and Summary of Significant Accounting Policies - Clinics in Operation Under Franchise Agreements or Company-owned or Managed (Details)

v3.25.2
Nature of Operations and Summary of Significant Accounting Policies - Clinics in Operation Under Franchise Agreements or Company-owned or Managed (Details) - clinic
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Product Information, Franchised Clinics, Company-Owned Or Managed Clinics, Activity [Roll Forward]        
Clinics in operation at the end of the period 967 960 967 960
Clinic licenses sold but not yet developed 92 113 92 113
Future clinic licenses subject to executed letters of intent 60 45 60 45
Franchised Clinics        
Product Information, Franchised Clinics, Company-Owned Or Managed Clinics, Activity [Roll Forward]        
Clinics open at beginning of period 847 819 842 800
Opened during the period 7 9 12 32
Acquired during the period 37 2 39 2
Sold during the period 0 0 0 0
Closed during the period (6) (1) (8) (5)
Clinics in operation at the end of the period 885 829 885 829
Company-Owned or Managed Clinics | Discontinued Operations, Held-for-Sale or Disposed of by Sale | Corporate Clinics        
Product Information, Franchised Clinics, Company-Owned Or Managed Clinics, Activity [Roll Forward]        
Clinics open at beginning of period 122 135 125 135
Opened during the period 0 0 0 0
Acquired during the period 0 0 0 0
Sold during the period (37) (2) (39) (2)
Closed during the period (3) (2) (4) (2)
Clinics in operation at the end of the period 82 131 82 131