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)

v3.25.1
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
Mar. 31, 2025
Mar. 31, 2024
Product Information, Franchised Clinics, Company-Owned Or Managed Clinics, Activity [Roll Forward]    
Clinics in operation at the end of the period 969 954
Clinic licenses sold but not yet developed 94 117
Future clinic licenses subject to executed letters of intent 52 46
Franchised Clinics    
Product Information, Franchised Clinics, Company-Owned Or Managed Clinics, Activity [Roll Forward]    
Clinics open at beginning of period 842 800
Opened during the period 5 23
Acquired during the period 0 0
Sold during the period 0 0
Closed during the period 0 (4)
Clinics in operation at the end of the period 847 819
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 125 135
Opened during the period 0 0
Acquired during the period 0 0
Sold during the period (2) 0
Closed during the period (1) 0
Clinics in operation at the end of the period 122 135