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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Schedule of Clinic Acquisition (Details) - Clinic |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 28, 2018 | Jun. 30, 2018 | Dec. 31, 2017
Business Combination, Description [Abstract] |  |  |
Number of clinics | 2 | 2 | 2
January 2017 Acquisition [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Acquisition date |  |  | Jan. 01, 2017
Percentage of interest acquired |  |  | 70.00%
Number of clinics |  |  | 17
May 2017 Acquisition [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Acquisition date |  |  | May 31, 2017
Percentage of interest acquired |  |  | 70.00%
Number of clinics |  |  | 4
June 2017 Acquisition [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Acquisition date |  |  | Jun. 30, 2017
Percentage of interest acquired |  |  | 60.00%
Number of clinics |  |  | 9
October 2017 Acquisition [Member] |  |  |
Business Combination, Description [Abstract] |  |  |
Acquisition date |  |  | Oct. 31, 2017
Percentage of interest acquired |  |  | 70.00%
Number of clinics |  |  | 9

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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