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ACQUISITIONS OF BUSINESSES (Details)
 6 Months Ended 12 Months Ended
May 31, 2017
USD ($)
Clinic
Installment
Mar. 23, 2017
USD ($)
Jan. 01, 2017
USD ($)
Clinic
Installment
Nov. 30, 2016
USD ($)
Clinic
Installment
Feb. 29, 2016
USD ($)
Clinic
Installment
Jun. 30, 2017
USD ($)
Clinic
Installment
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Subsidiary
Business Acquisition [Line Items]                
Seller notes issued for acquisition of interest in clinic           $ 1,650,000   $ 1,000,000
Number of subsidiaries acquired clinic practices | Subsidiary               2
Aggregate purchase price for the acquired clinic practices               $ 75,000
Cash paid, net of cash acquired           33,665,000 $ 12,958,000 23,623,000
Seller notes           1,650,000   1,000,000
Total consideration           35,315,000   24,623,000
Estimated fair value of net tangible assets acquired [Abstract]                
Total current assets           5,868,000   1,763,000
Total non-current assets           1,790,000   839,000
Total liabilities           (1,919,000)   (1,039,000)
Net tangible assets acquired           5,739,000   1,563,000
Referral relationships           4,693,000   4,919,000
Non-compete           1,790,000   847,000
Tradename           5,118,000   3,802,000
Goodwill           40,197,000   32,371,000
Fair value of non-controlling interest (classified as redeemable non-controlling interests)           (11,940,000)    
Fair value of non-controlling interest (classified as mandatorily redeemable non-controlling interests)           (10,282,000)   (18,879,000)
Total consideration           $ 35,315,000   $ 24,623,000
Referral Relationships [Member] | Minimum [Member]                
Business Acquisition [Line Items]                
Estimated useful lives of acquired intangibles           12 years    
Referral Relationships [Member] | Maximum [Member]                
Business Acquisition [Line Items]                
Estimated useful lives of acquired intangibles           13 years    
Non-compete Agreements [Member]                
Business Acquisition [Line Items]                
Estimated useful lives of acquired intangibles           6 years    
Acquisition of Seventeen Clinic Practices [Member]                
Business Acquisition [Line Items]                
Number of clinic practices acquired | Clinic     17          
Percentage of interest acquired               70.00%
Cash paid for acquisition of interest in clinic     $ 10,700,000          
Seller notes issued for acquisition of interest in clinic               $ 500,000
Business acquisition number of installments to payment of purchase consideration | Installment     2          
Seller notes               $ 500,000
Acquisition of Seventeen Clinic Practices [Member] | January 2018 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest     $ 250,000          
Acquisition of Seventeen Clinic Practices [Member] | January 2019 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest     $ 250,000          
Workforce Performance Solutions [Member]                
Business Acquisition [Line Items]                
Percentage of interest acquired   55.00%            
Cash paid for acquisition of interest in clinic   $ 6,200,000            
Seller notes issued for acquisition of interest in clinic   400,000            
Seller notes   $ 400,000            
Acquisition Of Four Clinic Practices [Member]                
Business Acquisition [Line Items]                
Number of clinic practices acquired | Clinic 4              
Percentage of interest acquired 70.00%              
Cash paid for acquisition of interest in clinic $ 2,300,000              
Seller notes issued for acquisition of interest in clinic $ 250,000              
Business acquisition number of installments to payment of purchase consideration | Installment 2              
Seller notes $ 250,000              
Acquisition Of Four Clinic Practices [Member] | May 2018 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest 125,000              
Acquisition Of Four Clinic Practices [Member] | May 2019 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest $ 125,000              
Acquisition Of Nine Clinic Practices [Member]                
Business Acquisition [Line Items]                
Number of clinic practices acquired | Clinic           9    
Percentage of interest acquired           60.00%    
Cash paid for acquisition of interest in clinic           $ 15,800,000    
Seller notes issued for acquisition of interest in clinic           $ 500,000    
Business acquisition number of installments to payment of purchase consideration | Installment           2    
Seller notes           $ 500,000    
Acquisition Of Nine Clinic Practices [Member] | June 2018 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest           250,000    
Acquisition Of Nine Clinic Practices [Member] | June 2019 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest           250,000    
Acquisition Of Twelve Clinic Practices [Member]                
Business Acquisition [Line Items]                
Number of clinic practices acquired | Clinic       12        
Percentage of interest acquired       60.00%        
Cash paid for acquisition of interest in clinic       $ 11,000,000        
Seller notes issued for acquisition of interest in clinic       $ 500,000        
Business acquisition number of installments to payment of purchase consideration | Installment       2        
Seller notes       $ 500,000        
Acquisition Of Twelve Clinic Practices [Member] | November 2017 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest       250,000        
Acquisition Of Twelve Clinic Practices [Member] | November 2018 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest       $ 250,000        
Acquisition Of Eight Clinic Practices [Member]                
Business Acquisition [Line Items]                
Number of clinic practices acquired | Clinic         8      
Percentage of interest acquired         55.00%      
Cash paid for acquisition of interest in clinic         $ 13,200,000      
Seller notes issued for acquisition of interest in clinic         $ 500,000      
Business acquisition number of installments to payment of purchase consideration | Installment         2      
Seller notes         $ 500,000      
Acquisition Of Eight Clinic Practices [Member] | February 2017 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest         250,000      
Acquisition Of Eight Clinic Practices [Member] | February 2018 [Member]                
Business Acquisition [Line Items]                
Acquisition cost payable in two principal installments including accrued interest         $ 250,000      
Acquisition Of Single Clinic Practice [Member]                
Business Acquisition [Line Items]                
Cash paid for acquisition of interest in clinic           $ 100,000