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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Schedule of Clinic Acquisition (Details) - Clinic | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |
Number of clinics | 2 |
June 2017 Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Acquisition date | Jun. 30, 2017 |
Percentage of interest acquired | 60.00% |
Number of clinics | 9 |
May 2017 Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Acquisition date | May 31, 2017 |
Percentage of interest acquired | 70.00% |
Number of clinics | 4 |
January 2017 Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Acquisition date | Jan. 01, 2017 |
Percentage of interest acquired | 70.00% |
Number of clinics | 17 |
February 2016 Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Acquisition date |  | Feb. 29, 2016
Percentage of interest acquired |  | 55.00%
Number of clinics |  | 8
November 2016 Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Acquisition date |  | Nov. 30, 2016
Percentage of interest acquired |  | 60.00%
Number of clinics |  | 12

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