REVENUES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue
Total revenues	$ 21,374,127	$ 43,657,292	$ 57,577,556	$ 82,978,004
Petroleum products
Disaggregation of Revenue
Total revenues	18,394,246	41,827,809	51,188,992	78,713,134
Metals
Disaggregation of Revenue
Total revenues	2,979,881	1,829,483	6,388,564	4,264,870
Northern United States
Disaggregation of Revenue
Total revenues	6,167,062	9,880,565	15,725,631	19,204,348
Southern United States
Disaggregation of Revenue
Total revenues	15,207,065	33,776,727	41,851,925	63,773,656
Black Oil
Disaggregation of Revenue
Total revenues	11,543,135	37,907,811	41,074,507	70,722,998
Black Oil | Petroleum products
Disaggregation of Revenue
Total revenues	11,543,135	37,907,811	41,074,507	70,722,998
Black Oil | Metals
Disaggregation of Revenue
Total revenues	0	0	0	0
Black Oil | Northern United States
Disaggregation of Revenue
Total revenues	6,167,062	9,880,565	15,725,631	19,204,348
Black Oil | Southern United States
Disaggregation of Revenue
Total revenues	5,376,073	28,027,246	25,348,876	51,518,650
Refining & Marketing
Disaggregation of Revenue
Total revenues	6,297,328	3,277,402	8,807,921	6,136,023
Refining & Marketing | Petroleum products
Disaggregation of Revenue
Total revenues	6,297,328	3,277,402	8,807,921	6,136,023
Refining & Marketing | Metals
Disaggregation of Revenue
Total revenues	0	0	0	0
Refining & Marketing | Northern United States
Disaggregation of Revenue
Total revenues	0	0	0	0
Refining & Marketing | Southern United States
Disaggregation of Revenue
Total revenues	6,297,328	3,277,402	8,807,921	6,136,023
Recovery
Disaggregation of Revenue
Total revenues	3,533,664	2,472,079	7,695,128	6,118,983
Recovery | Petroleum products
Disaggregation of Revenue
Total revenues	553,783	642,596	1,306,564	1,854,113
Recovery | Metals
Disaggregation of Revenue
Total revenues	2,979,881	1,829,483	6,388,564	4,264,870
Recovery | Northern United States
Disaggregation of Revenue
Total revenues	0	0	0	0
Recovery | Southern United States
Disaggregation of Revenue
Total revenues	$ 3,533,664	$ 2,472,079	$ 7,695,128	$ 6,118,983