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Property and Equipment (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Price_Per_Mcf
Jun. 30, 2012
Price_Per_Mcf
Jun. 30, 2013
Price_Per_Mcf
Jun. 30, 2012
Price_Per_Mcf
Jun. 30, 2013
Unproved properties not subject to depletion [Member]
Dec. 31, 2012
Unproved properties not subject to depletion [Member]
Property and Equipment (Textual)            
Oil and gas properties, gross         $ 1,743,000 $ 1,126,000
Period of amortization of capital costs         5 years  
Capitalized overhead applicable to acquisition, development and exploration activities     234,000 275,000    
Depletion expense related to oil and gas properties 642,000 826,000 1,200,000 1,800,000    
Depletion expense related to oil and gas properties (in dollars per Mcfe) 0.88 1.28 0.90 1.36    
Impairment of oil and gas properties    9,909,000    15,407,000    
Depreciation and amortization expense     $ 59,000 $ 48,000