EARNINGS (LOSS) PER UNIT (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Earnings per unit
Net loss attributable to common units	$ (16,261,051)		$ (3,711,798)	$ (31,706,677)	$ (55,157,974)	$ (56,767,549)
Net loss attributable to common units per unit (basic)	$ (0.73)		$ (0.15)	$ (1.53)	$ (2.91)
Weighted average number of common units outstanding Basic (in units)	22,399,748		24,079,289	20,715,633	18,962,446
Net loss attributable to common units per unit (diluted)	$ (0.73)		$ (0.15)	$ (1.53)	$ (2.91)
Weighted average number of common units outstanding Diluted (in units)	22,399,748		24,079,289	20,715,633	18,962,446
Restricted Units
Earnings per unit
Anti-dilutive options outstanding		975,540	437,641	975,540	437,641