REVENUES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 163,365,565	$ 180,720,661
Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	154,893,008	168,733,378
Metals
Disaggregation of Revenue [Line Items]
Revenues	8,472,557	11,987,283
Northern United States
Disaggregation of Revenue [Line Items]
Revenues	42,195,020	41,207,747
Southern United States
Disaggregation of Revenue [Line Items]
Revenues	121,170,545	139,512,914
Black Oil
Disaggregation of Revenue [Line Items]
Revenues	139,269,164	143,836,981
Black Oil | Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	139,269,164	143,836,981
Black Oil | Metals
Disaggregation of Revenue [Line Items]
Revenues	0	0
Black Oil | Northern United States
Disaggregation of Revenue [Line Items]
Revenues	42,195,020	41,207,747
Black Oil | Southern United States
Disaggregation of Revenue [Line Items]
Revenues	97,074,144	102,629,234
Refining & Marketing
Disaggregation of Revenue [Line Items]
Revenues	12,957,767	22,935,482
Refining & Marketing | Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	12,957,767	22,935,482
Refining & Marketing | Metals
Disaggregation of Revenue [Line Items]
Revenues	0	0
Refining & Marketing | Northern United States
Disaggregation of Revenue [Line Items]
Revenues	0	0
Refining & Marketing | Southern United States
Disaggregation of Revenue [Line Items]
Revenues	12,957,767	22,935,482
Recovery
Disaggregation of Revenue [Line Items]
Revenues	11,138,634	13,948,198
Recovery | Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	2,666,077	1,960,915
Recovery | Metals
Disaggregation of Revenue [Line Items]
Revenues	8,472,557	11,987,283
Recovery | Northern United States
Disaggregation of Revenue [Line Items]
Revenues	0	0
Recovery | Southern United States
Disaggregation of Revenue [Line Items]
Revenues	$ 11,138,634	$ 13,948,198