12. Inventories (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Inventory Disclosure [Abstract]
Low-sulfur diesel	$ 397,240	$ 2,193,864
Naphtha	1,562,055	1,067,011
Atmospheric gas oil	322,356	1,010,877
Other liquids		64,486
Propane		59,599
Crude	19,041	134,289
Supplies		3,835
Inventory	$ 2,300,692	$ 4,533,961

Carrying amount as of the balance sheet date of capitalized payments for supplies which will be consumed in operations within one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 4

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6787-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (g)(7)

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765

Name:	us-gaap_Supplies
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant