CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES (Details) - Customer concentration risk	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	31.00%	42.00%
Revenues | Customer 1 | Black Oil
Revenue, Major Customer [Line Items]
Concentration percentage	36.00%	53.00%
Revenues | Customer 1 | Refining
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 1 | Recovery
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	17.00%	2.00%
Revenues | Customer 2 | Black Oil
Revenue, Major Customer [Line Items]
Concentration percentage	20.00%	3.00%
Revenues | Customer 2 | Refining
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 2 | Recovery
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 3
Revenue, Major Customer [Line Items]
Concentration percentage	11.00%	9.00%
Revenues | Customer 3 | Black Oil
Revenue, Major Customer [Line Items]
Concentration percentage	12.00%	11.00%
Revenues | Customer 3 | Refining
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 3 | Recovery
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 4
Revenue, Major Customer [Line Items]
Concentration percentage	7.00%	0.00%
Revenues | Customer 4 | Black Oil
Revenue, Major Customer [Line Items]
Concentration percentage	8.00%	0.00%
Revenues | Customer 4 | Refining
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 4 | Recovery
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 5
Revenue, Major Customer [Line Items]
Concentration percentage	4.00%	5.00%
Revenues | Customer 5 | Black Oil
Revenue, Major Customer [Line Items]
Concentration percentage	4.00%	6.00%
Revenues | Customer 5 | Refining
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Revenues | Customer 5 | Recovery
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	0.00%
Receivables | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	20.00%	13.00%
Receivables | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	0.00%	3.00%
Receivables | Customer 3
Revenue, Major Customer [Line Items]
Concentration percentage	8.00%	1.00%
Receivables | Customer 4
Revenue, Major Customer [Line Items]
Concentration percentage	14.00%	0.00%
Receivables | Customer 5
Revenue, Major Customer [Line Items]
Concentration percentage	10.00%	18.00%