SEGMENT REPORTING (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 50,632,948	$ 32,470,451	$ 138,918,913	$ 104,153,844
Income (loss) from operations	574,083	(3,614,592)	2,581,431	(7,933,606)
Black Oil
Segment Reporting Information [Line Items]
Revenues	40,400,064	25,358,317	111,106,441	77,546,802
Refining & Marketing
Segment Reporting Information [Line Items]
Revenues	7,313,630	4,856,520	17,381,741	15,436,919
Recovery
Segment Reporting Information [Line Items]
Revenues	2,919,254	2,255,614	10,430,731	11,170,123
Operating segments | Black Oil
Segment Reporting Information [Line Items]
Revenues	40,400,064	25,358,317	111,106,441	77,546,802
Income (loss) from operations	1,769,439	(2,769,027)	3,979,619	(6,816,027)
Operating segments | Refining & Marketing
Segment Reporting Information [Line Items]
Revenues	7,313,630	4,856,520	17,381,741	15,436,919
Income (loss) from operations	(418,482)	(708,175)	(1,119,522)	(920,726)
Operating segments | Recovery
Segment Reporting Information [Line Items]
Revenues	2,919,254	2,255,614	10,430,731	11,170,123
Income (loss) from operations	$ (776,874)	$ (137,390)	$ (278,666)	$ (196,853)