CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES (Tables)

3 Months Ended

Mar. 31, 2020

Concentrations, Significant Customers, Commitments And Contingencies Disclosure [Abstract]

At March 31, 2020 and 2019 and for each of the three months then ended, the Company’s revenues and receivables were comprised of the following customer concentrations:



	Three Months Ended March 31, 2020		Three Months Ended March 31, 2019
	% of Revenues	% of Receivables	% of Revenues	% of Receivables
Customer 1	47%	23%	35%	28%
Customer 2	10%	18%	5%	9%
Customer 3	4%	11%	—%	—%
Customer 4	4%	2%	12%	12%

At March 31, 2020 and 2019 and for each of the three months then ended, the Company's segment revenues were comprised of the following customer concentrations:



	% of Revenue by Segment			% Revenue by Segment
	Three Months Ended March 31, 2020			Three Months Ended March 31, 2019
	Black Oil	Refining	Recovery	Black Oil	Refining	Recovery
Customer 1	58%	—%	—%	41%	—%	—%
Customer 2	13%	—%	—%	6%	—%	—%
Customer 3	—%	—%	37%	—%	—%	—%
Customer 4	5%	—%	—%	15%	—%	—%