SEGMENT REPORTING (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 36,203,429	$ 39,320,712
Income (loss) from operations	1,031,510	(2,608,391)
Black Oil
Segment Reporting Information [Line Items]
Revenues	29,531,370	32,815,187
Income (loss) from operations	2,781,909	(2,292,205)
Refining & Marketing
Segment Reporting Information [Line Items]
Revenues	2,510,593	2,858,621
Income (loss) from operations	(884,015)	(403,014)
Recovery
Segment Reporting Information [Line Items]
Revenues	4,161,466	3,646,904
Income (loss) from operations	$ (866,384)	$ 86,828