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Related-Party Transaction (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Mr Alexander [Member]
     
Noncontrolling Interest, Ownership Percentage By Parent 33.00%    
Oil and Gas Properties [Member]
     
Royalty Expense $ 222,500 $ 226,200 $ 195,000