15. Concentration of Risk (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Total refined petroleum product sales	$ 54,924,070	$ 87,846,757	$ 174,830,292	$ 310,938,981
Concentration Risk	100.00%	100.00%	100.00%	100.00%
LPG mix
Total refined petroleum product sales	$ 617,715	$ 146,452	$ 909,207	$ 670,473
Concentration Risk	1.10%	0.20%	0.50%	0.20%
Naphtha
Total refined petroleum product sales	$ 11,218,381	$ 19,195,974	$ 38,048,064	$ 73,061,235
Concentration Risk	20.40%	21.80%	21.80%	23.50%
Jet Fuel
Total refined petroleum product sales	$ 17,782,534	$ 25,978,551	$ 51,713,507	$ 65,616,193
Concentration Risk	32.40%	29.60%	29.60%	21.10%
NRLM
Total refined petroleum product sales				$ 62,729,476
Concentration Risk	0.00%	0.00%	0.00%	20.20%
HOBM
Total refined petroleum product sales	$ 9,609,536	$ 22,094,185	$ 40,640,975	$ 29,321,261
Concentration Risk	17.50%	25.10%	23.20%	9.40%
Reduced crude
Total refined petroleum product sales	$ 50,407		$ 50,407
Concentration Risk	0.10%	0.00%	0.00%	0.00%
AGO
Total refined petroleum product sales	$ 15,645,497	$ 20,431,595	$ 43,468,132	$ 79,540,343
Concentration Risk	28.50%	23.30%	24.90%	25.60%