CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES -Schedule of Concentrations and Segment Revenues (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	34.00%	17.00%
Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	11.00%	5.00%
Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	8.00%	9.00%
Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	7.00%	13.00%
Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	4.00%	0.00%
Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	2.00%
Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	14.00%
Receivables | Customer 1
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	21.00%	10.00%
Receivables | Customer 2
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Receivables | Customer 3
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	6.00%	11.00%
Receivables | Customer 4
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	6.00%	7.00%
Receivables | Customer 5
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	13.00%	0.00%
Receivables | Customer 6
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	15.00%
Receivables | Customer 7
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Black Oil | Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	100.00%	100.00%
Black Oil | Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	100.00%	100.00%
Black Oil | Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Black Oil | Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	100.00%	100.00%
Black Oil | Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	100.00%	100.00%
Black Oil | Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	100.00%	100.00%
Black Oil | Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	100.00%	100.00%
Refining | Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Refining | Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Refining | Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	100.00%	100.00%
Refining | Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Refining | Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Refining | Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Refining | Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Recovery | Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Recovery | Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Recovery | Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Recovery | Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Recovery | Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Recovery | Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%
Recovery | Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration (as a percentage)	0.00%	0.00%