CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES (Details) - Customer concentration risk	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	19.00%	19.00%
Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	13.00%	9.00%
Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration percentage	11.00%	8.00%
Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration percentage	7.00%	0.00%
Revenues | Customer 5
Revenue, Major Customer [Line Items]
Concentration percentage	4.00%	12.00%
Revenues | Customer 6
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Receivables | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	17.00%
Receivables | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	11.00%	1.00%
Receivables | Customer 3
Revenue, Major Customer [Line Items]
Concentration percentage	5.00%	6.00%
Receivables | Customer 4
Revenue, Major Customer [Line Items]
Concentration percentage	21.00%	0.00%
Receivables | Customer 5
Revenue, Major Customer [Line Items]
Concentration percentage	2.00%	5.00%
Receivables | Customer 6
Revenue, Major Customer [Line Items]
Concentration percentage	9.00%	12.00%
Black Oil | Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	100.00%	100.00%
Black Oil | Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	100.00%	100.00%
Black Oil | Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Black Oil | Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration percentage	100.00%	100.00%
Black Oil | Revenues | Customer 5
Revenue, Major Customer [Line Items]
Concentration percentage	100.00%	100.00%
Black Oil | Revenues | Customer 6
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Refining | Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Refining | Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Refining | Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration percentage	100.00%	100.00%
Refining | Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Refining | Revenues | Customer 5
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Refining | Revenues | Customer 6
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Recovery | Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Recovery | Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Recovery | Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Recovery | Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Recovery | Revenues | Customer 5
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Recovery | Revenues | Customer 6
Revenue, Major Customer [Line Items]
Concentration percentage	100.00%	100.00%