Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Details)

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Commitments And Contingencies (Details) (USD $)
 0月结束 36 Months Ended
2月. 15, 2011
4月. 20, 2009
3月. 11, 1997
Y
12月. 31, 2007
3月. 31, 2012
12月. 31, 2011
12月. 07, 2010
Commitments [Line Items]              
Percentage of interest in WCBB     50.00%        
Contribution to plugging and abandonment trust per month     $ 18,000        
Annual minimum wells to be plugged     20        
Number of wells plugged         334    
Plugging and abandonment escrow account on the WCBB properties (Note 10)         3,121,000 3,121,000  
Tenure of minimum wells to be plugged, years     20        
Alleged severance tax underpayment       1,800,000      
Lawsuits filed value 26,500,000 2,275,729          
Original number of acreage in litigation             240
Amended number of acreage in litigation             1,700
WCBB(成员)
              
Commitments [Line Items]              
Plugging and abandonment escrow account on the WCBB properties (Note 10)         3,121,000    
Disgorgement [Member]
              
Commitments [Line Items]              
Lawsuits filed value $ 6,000,000            
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