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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT (Details)
1 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
Installment
Clinic
Apr. 30, 2019
USD ($)
Mar. 04, 2019
USD ($)
Installment
Aug. 31, 2018
USD ($)
Installment
Clinic
Apr. 30, 2018
USD ($)
Installment
Feb. 28, 2018
USD ($)
Clinic
Apr. 30, 2020
USD ($)
Aug. 31, 2019
USD ($)
Nov. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Jan. 31, 2016
USD ($)
Sep. 30, 2019
USD ($)
Installment
Dec. 31, 2018
Clinic
Apr. 12, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 05, 2013
USD ($)
Debt Instruments [Abstract]                                
Number of clinic practices acquired | Clinic       4   2             5      
Seller notes $ 283,000       $ 950,000             $ 283,000     $ 0  
Number of principal installments | Installment                       2        
2018 Acquisition [Member] | August 2019 [Member]                                
Debt Instruments [Abstract]                                
Acquisition cost payable in installments including accrued interest       $ 200,000                        
2018 Acquisition [Member] | August 2020 [Member]                                
Debt Instruments [Abstract]                                
Acquisition cost payable in installments including accrued interest       $ 200,000                        
September 2019 Acquisition [Member]                                
Debt Instruments [Abstract]                                
Number of clinic practices acquired | Clinic 11                              
Seller notes $ 300,000                     $ 300,000        
Percentage of interest accrued 5.00%                     5.00%        
Number of principal installments | Installment 2                              
Industrial Injury Prevention [Member]                                
Debt Instruments [Abstract]                                
Seller notes         $ 400,000         $ 400,000            
Industrial Injury Prevention [Member] | Subsequent Event [Member]                                
Debt Instruments [Abstract]                                
Payment of debt             $ 200,000                  
Industrial Injury Prevention [Member] | April 2020 [Member]                                
Debt Instruments [Abstract]                                
Acquisition cost payable in installments including accrued interest   $ 200,000                            
Notes Payable [Member]                                
Debt Instruments [Abstract]                                
Average effective interest rate       5.00% 4.75%                      
Notes Payable [Member] | Redeemable Non-Controlling Interest [Member]                                
Debt Instruments [Abstract]                                
Aggregate amount of notes payable     $ 228,120                          
Number of principal installments | Installment     2                          
Notes Payable [Member] | March 2020 [Member] | Redeemable Non-Controlling Interest [Member]                                
Debt Instruments [Abstract]                                
Acquisition cost payable in installments including accrued interest     $ 114,080                          
Notes Payable [Member] | March 2021 [Member] | Redeemable Non-Controlling Interest [Member]                                
Debt Instruments [Abstract]                                
Acquisition cost payable in installments including accrued interest     $ 114,080                          
Notes Payable [Member] | 2018 Acquisition [Member]                                
Debt Instruments [Abstract]                                
Aggregate amount of notes payable       $ 400,000   $ 150,000                    
Number of principal installments | Installment       2                        
Average effective interest rate           4.50%                    
Payment of debt               $ 150,000                
Notes Payable [Member] | 2019 Acquisition [Member]                                
Debt Instruments [Abstract]                                
Seller notes                           $ 4,000,000    
Percentage of interest accrued                           5.50%    
Notes Payable [Member] | September 2019 Acquisition [Member]                                
Debt Instruments [Abstract]                                
Seller notes $ 300,000                     $ 300,000        
Percentage of interest accrued 5.00%                     5.00%        
Number of principal installments | Installment                       2        
Notes Payable [Member] | Industrial Injury Prevention [Member]                                
Debt Instruments [Abstract]                                
Aggregate amount of notes payable         $ 400,000                      
Number of principal installments | Installment         2                      
Minimum [Member]                                
Debt Instruments [Abstract]                                
Spread on Libor variable rate 1.25%                     1.25%        
Spread on variable rate                       0.10%        
Percentage of unused commitment fee                       0.25%        
Maximum [Member]                                
Debt Instruments [Abstract]                                
Spread on Libor variable rate 2.00%                     2.00%        
Spread on variable rate                       1.00%        
Percentage of unused commitment fee                       0.30%        
Credit Facility [Member]                                
Debt Instruments [Abstract]                                
Revolving credit facility commitment                               $ 125,000,000
Revolving credit facility maturity date                       Nov. 30, 2021        
Remaining revolving credit outstanding $ 74,000,000                     $ 74,000,000        
Average effective interest rate                       4.03%        
Credit Agreement [Member]                                
Debt Instruments [Abstract]                                
Cash and noncash consideration with respect to acquisition after amendment                     $ 50,000,000          
Credit Agreement [Member] | Maximum [Member]                                
Debt Instruments [Abstract]                                
Cash dividends after amendment                 $ 20,000,000 $ 15,000,000 $ 10,000,000