CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2021

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

Schedule of concentrations

For the years ended December 31, 2021, 2020, and 2019, the Company’s revenues and receivables were comprised of the following customer concentrations:

	2021		2020		2019
	% of Revenues	% of Receivables	% of Revenues	% of Receivables	% of Revenues	% of Receivables
Customer 1	22%	13%	21%	13%	—%	—%
Customer 2	16%	11%	13%	8%	—%	—%
Customer 3	13%	18%	7%	8%	8%	3%
Customer 4	12%	18%	13%	14%	59%	28%
Customer 5	7%	3%	6%	3%	—%	—%

At December 31, 2021, 2020 and 2019, and for the years then ended, the Company's segment revenues were comprised of the following customer concentrations:

	% of Revenue by Segment 2021						% of Revenue by Segment 2020						% of Revenue by Segment 2019
	Black Oil		Refining		Recovery		Black Oil		Refining		Recovery		Black Oil		Refining		Recovery
Customer 1	—	%	27	%	—	%	—	%	28	%	—	%	—	%	—	%	—	%
Customer 2	—	%	20	%	—	%	—	%	17	%	—	%	—	%	—	%	—	%
Customer 3	—	%	—	%	67	%	—	%	—	%	31	%	—	%	—	%	27	%
Customer 4	—	%	14	%	—	%	—	%	18	%	—	%	—	%	84	%	—	%
Customer 5	—	%	8	%	—	%	—	%	8	%	—	%	—	%	—	%	—	%