SEGMENT REPORTING (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenues	$ 37,799,259	$ 50,632,948	$ 120,777,263	$ 138,918,913
Income (loss) from operations	(2,541,823)	574,083	(5,818,092)	2,581,431
Black Oil
Segment Reporting Information [Line Items]
Revenues	32,330,531	40,400,064	103,053,529	111,106,441
Income (loss) from operations	(1,782,849)	1,769,439	(3,949,202)	3,979,619
Refining & Marketing
Segment Reporting Information [Line Items]
Revenues	3,076,454	7,313,630	9,212,477	17,381,741
Income (loss) from operations	(177,697)	(418,482)	(713,119)	(1,119,522)
Recovery
Segment Reporting Information [Line Items]
Revenues	2,392,274	2,919,254	8,511,257	10,430,731
Income (loss) from operations	$ (581,277)	$ (776,874)	$ (1,155,771)	$ (278,666)