CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES (Details) - Customer concentration risk	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	35.00%	42.00%
Revenues | Customer 1 | Black Oil
Revenue, Major Customer [Line Items]
Concentration percentage	42.00%	54.00%
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	12.00%	7.00%
Revenues | Customer 2 | Black Oil
Revenue, Major Customer [Line Items]
Concentration percentage	15.00%	9.00%
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%
Receivables | Customer 1
Revenue, Major Customer [Line Items]
Concentration percentage	28.00%	13.00%
Receivables | Customer 2
Revenue, Major Customer [Line Items]
Concentration percentage	12.00%	3.00%