ACQUISITIONS, JOINT VENTURES AND DIVESTITURES - Pro forma (Details) - Haymaker Acquisition, Dropdown and Phillips Acquisition - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pro forma results
Total revenue	$ 32,978,851	$ 30,506,261	$ 87,871,247	$ 91,943,767
Net loss attributable to common units	$ (16,261,051)	$ (1,694,292)	$ (27,233,939)	$ (17,260,464)
Net loss attributable to common units - basic (in dollar per unit)	$ (0.73)	$ (0.08)	$ (1.31)	$ (0.83)
Net loss attributable to common units - Diluted (in dollar per unit)	$ (0.73)	$ (0.08)	$ (1.31)	$ (0.83)