REVENUES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 180,720,661	$ 145,499,092
Northern United States
Disaggregation of Revenue [Line Items]
Revenues	41,207,747	31,242,068
Southern United States
Disaggregation of Revenue [Line Items]
Revenues	139,512,914	114,257,024
Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	168,733,378	138,156,622
Metals
Disaggregation of Revenue [Line Items]
Revenues	11,987,283	7,342,470
Black Oil
Disaggregation of Revenue [Line Items]
Revenues	143,836,981	107,988,551
Black Oil | Northern United States
Disaggregation of Revenue [Line Items]
Revenues	41,207,747	31,242,068
Black Oil | Southern United States
Disaggregation of Revenue [Line Items]
Revenues	102,629,234	76,746,483
Black Oil | Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	143,836,981	107,988,551
Black Oil | Metals
Disaggregation of Revenue [Line Items]
Revenues	0	0
Refining & Marketing
Disaggregation of Revenue [Line Items]
Revenues	22,935,482	20,097,325
Refining & Marketing | Northern United States
Disaggregation of Revenue [Line Items]
Revenues	0	0
Refining & Marketing | Southern United States
Disaggregation of Revenue [Line Items]
Revenues	22,935,482	20,097,325
Refining & Marketing | Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	22,935,482	20,097,325
Refining & Marketing | Metals
Disaggregation of Revenue [Line Items]
Revenues	0	0
Recovery
Disaggregation of Revenue [Line Items]
Revenues	13,948,198	17,413,216
Recovery | Northern United States
Disaggregation of Revenue [Line Items]
Revenues	0	0
Recovery | Southern United States
Disaggregation of Revenue [Line Items]
Revenues	13,948,198	17,413,216
Recovery | Petroleum products
Disaggregation of Revenue [Line Items]
Revenues	1,960,915	10,070,746
Recovery | Metals
Disaggregation of Revenue [Line Items]
Revenues	$ 11,987,283	$ 7,342,470