CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES - Schedule of Segment Revenues and Receivables Comprised of Customer Concentrations (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration risk percentage	40.00%	34.00%
Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration risk percentage	8.00%	0.00%
Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration risk percentage	9.00%	11.00%
Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration risk percentage	3.00%	4.00%
Receivables | Customer 1
Revenue, Major Customer [Line Items]
Concentration risk percentage	36.00%	21.00%
Receivables | Customer 2
Revenue, Major Customer [Line Items]
Concentration risk percentage	14.00%	0.00%
Receivables | Customer 3
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Receivables | Customer 4
Revenue, Major Customer [Line Items]
Concentration risk percentage	7.00%	13.00%
Black Oil | Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration risk percentage	47.00%	43.00%
Black Oil | Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration risk percentage	10.00%	0.00%
Black Oil | Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration risk percentage	10.00%	14.00%
Black Oil | Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration risk percentage	4.00%	5.00%
Refining | Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Refining | Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Refining | Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Refining | Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Recovery | Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Recovery | Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Recovery | Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%
Recovery | Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration risk percentage	0.00%	0.00%