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UNIT-BASED COMPENSATION (Details) - USD ($)
1 Months Ended 5 Months Ended 6 Months Ended 12 Months Ended
Feb. 07, 2017
Jun. 30, 2017
Jun. 30, 2018
Dec. 31, 2017
Oct. 01, 2014
Weighted Average Remaining Contractual Term          
Share-based compensation   $ 135,692 $ 1,391,973    
Long-Term Incentive Plan          
Unit-based compensation          
Authorized issuance of units     2,041,600    
Vesting period     3 years    
Long-Term Incentive Plan | First Anniversary          
Unit-based compensation          
Vesting percent     33.30%    
Long-Term Incentive Plan | Second Anniversary          
Unit-based compensation          
Vesting percent     33.30%    
Long-Term Incentive Plan | Third Anniversary          
Unit-based compensation          
Vesting percent     33.30%    
Long-Term Incentive Plan | Restricted Units          
Unvested Units          
Unvested at beginning of period (in units)     167,571    
Granted - service condition employees (in units)     327,306    
Granted - service condition consultants (in units)     3,826    
Forfeited (in units)     (1,469)    
Vested (in units)     (58,449)    
Unvested at end of period (in units)     438,785 167,571  
Unvested Weighted Average Grant-Date Fair Value          
Unvested at beginning of period (in dollars per unit)     $ 18.655    
Granted - service condition employees (in dollars per unit)     $ 19.080    
Granted - service condition consultants (in dollars per unit)     16.260    
Forfeited (in dollars per unit)     $ (16.260)    
Vested (in dollars per unit)     (18.470)    
Unvested at end of period (in dollars per unit)     $ 18.871 $ 18.655  
Weighted Average Remaining Contractual Term          
Unvested contractual term, at end of period     1 year 6 months 11 days 1 year 4 months 11 days  
Predecessor          
Weighted Average Remaining Contractual Term          
Share-based compensation $ 50,422        
Predecessor | Long-Term Incentive Plan          
Unit-based compensation          
Authorized issuance of units         110,000
Weighted Average Remaining Contractual Term          
Share-based compensation $ 50,000