Related-party Transaction (Details Textual) (USD $)	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Mr Alexander [Member]
Minority Interest Ownership Percentage By Parent	33.00%
Oil and Gas Properties [Member]
Royalty Expense	$ 137,000	$ 119,000

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_RoyaltyExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration