Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

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Consolidated Balance Sheets (Parenthetical) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2010
Consolidated Balance Sheets    
Capitalized costs of oil and natural gas properties excluded from amortization $ 59,734,000 $ 16,778,000
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 5,000,000 5,000,000
12% cumulative preferred stock, shares authorized 30,000 30,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 47,480,032 44,645,435
Common stock, shares outstanding 47,480,032 44,645,435