SEGMENT REPORTING (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 39,320,712	$ 41,368,195
Income (loss) from operations	(2,608,391)	(1,016,497)
Black Oil
Segment Reporting Information [Line Items]
Revenues	32,815,187	32,237,246
Refining & Marketing
Segment Reporting Information [Line Items]
Revenues	2,858,621	5,675,241
Recovery
Segment Reporting Information [Line Items]
Revenues	3,646,904	3,455,708
Operating segments | Black Oil
Segment Reporting Information [Line Items]
Revenues	32,815,187	32,237,246
Income (loss) from operations	(2,292,205)	(759,352)
Operating segments | Refining & Marketing
Segment Reporting Information [Line Items]
Revenues	2,858,621	5,675,241
Income (loss) from operations	(403,014)	(343,385)
Operating segments | Recovery
Segment Reporting Information [Line Items]
Revenues	3,646,904	3,455,708
Income (loss) from operations	$ 86,828	$ 86,240