Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Nature of Operations and Summary of Significant Accounting Policies - Clinics in Operation Under Franchise Agreements or Company-owned or Managed (Details)

v3.7.0.1
Note 1 - Nature of Operations and Summary of Significant Accounting Policies - Clinics in Operation Under Franchise Agreements or Company-owned or Managed (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Clinics in operation at the end of the period 383 341 383 341    
Number of Stores 383 341 383 341 383 341
Clinics licenses sold but not yet developed         109 134
Franchised Units [Member]            
Clinics open at beginning of period 326 277 309 265    
Opened or purchased during the period 11 11 29 25    
Acquired during the period (6) (6)    
Acquired during the period 6 6    
Closed during the period (1) (2) (2) (4)    
Clinics in operation at the end of the period 336 280 336 280    
Number of Stores 326 277 309 265 336 280
Entity Operated Units [Member]            
Clinics open at beginning of period 47 54 61 47    
Opened or purchased during the period 1 8    
Acquired during the period (6) (6)    
Acquired during the period 6 6    
Closed during the period (14)    
Clinics in operation at the end of the period 47 61 47 61    
Number of Stores 47 54 61 47 47 61