REVENUE - Summary of Company's major customers as a percentage of total revenue (Details) - Revenue Benchmark - Customer Concentration Risk	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Concentration Risk [Line Items]
Percentage of concentration risk	100.00%	100.00%	100.00%	100.00%
ARM Energy Management, LLC
Concentration Risk [Line Items]
Percentage of concentration risk		89.00%	63.00%	74.00%
Midcon Gathering
Concentration Risk [Line Items]
Percentage of concentration risk	87.00%		30.00%
Lucid Energy Delaware, LLC
Concentration Risk [Line Items]
Percentage of concentration risk	12.00%	11.00%	6.00%	10.00%
Texican Crude & Hydrocarbon, LLC
Concentration Risk [Line Items]
Percentage of concentration risk				16.00%
Other below 10%
Concentration Risk [Line Items]
Percentage of concentration risk	1.00%		1.00%