Note 1 - Nature of Operations and Summary of Significant Accounting Policies - Clinics in Operation Under Franchise Agreements or Company-owned or Managed (Details)
|
12 Months Ended |
|
|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Clinics in operation at beginning of period |
312
|
|
|
|
| Clinics in operation at the end of the period |
370
|
312
|
|
|
| Number of Stores |
370
|
312
|
370
|
312
|
| Clinic licenses sold but not yet developed |
|
|
115
|
168
|
| Franchised Units [Member] |
|
|
|
|
| Clinics in operation at beginning of period |
265
|
242
|
|
|
| Opened during the period |
56
|
54
|
|
|
| Acquired during the period |
(6)
|
(24)
|
|
|
| Closed during the period |
(6)
|
(7)
|
|
|
| Clinics in operation at the end of the period |
309
|
265
|
|
|
| Acquired during the period |
6
|
24
|
|
|
| Number of Stores |
265
|
265
|
309
|
265
|
| Entity Operated Units [Member] |
|
|
|
|
| Clinics in operation at beginning of period |
47
|
4
|
|
|
| Opened during the period |
8
|
21
|
|
|
| Acquired during the period |
(6)
|
(24)
|
|
|
| Closed during the period |
|
(2)
|
|
|
| Clinics in operation at the end of the period |
61
|
47
|
|
|
| Acquired during the period |
6
|
24
|
|
|
| Number of Stores |
47
|
47
|
61
|
47
|