CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES (Details) - Customer Concentration Risk	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration, percentage	17.00%	7.00%
Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration, percentage	14.00%	19.00%
Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration, percentage	13.00%	9.00%
Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration, percentage	9.00%	8.00%
Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration, percentage	2.00%	0.00%
Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration, percentage	3.00%	11.00%
Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration, percentage	4.00%	5.00%
Receivables | Customer 1
Revenue, Major Customer [Line Items]
Concentration, percentage	10.00%	0.00%
Receivables | Customer 2
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Receivables | Customer 3
Revenue, Major Customer [Line Items]
Concentration, percentage	7.00%	9.00%
Receivables | Customer 4
Revenue, Major Customer [Line Items]
Concentration, percentage	11.00%	4.00%
Receivables | Customer 5
Revenue, Major Customer [Line Items]
Concentration, percentage	15.00%	0.00%
Receivables | Customer 6
Revenue, Major Customer [Line Items]
Concentration, percentage	2.00%	10.00%
Receivables | Customer 7
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	10.00%
Black Oil | Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration, percentage	100.00%	100.00%
Black Oil | Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration, percentage	100.00%	100.00%
Black Oil | Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration, percentage	100.00%	100.00%
Black Oil | Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Black Oil | Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration, percentage	100.00%	0.00%
Black Oil | Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration, percentage	100.00%	100.00%
Black Oil | Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Refining | Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Refining | Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Refining | Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Refining | Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration, percentage	100.00%	100.00%
Refining | Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Refining | Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Refining | Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Recovery | Revenue | Customer 1
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Recovery | Revenue | Customer 2
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Recovery | Revenue | Customer 3
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Recovery | Revenue | Customer 4
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Recovery | Revenue | Customer 5
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Recovery | Revenue | Customer 6
Revenue, Major Customer [Line Items]
Concentration, percentage	0.00%	0.00%
Recovery | Revenue | Customer 7
Revenue, Major Customer [Line Items]
Concentration, percentage	100.00%	100.00%