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Consolidated Balance Sheets (Parenthetical) (USD $)
3 Months Ended
Sep. 30, 2011
Jun. 30, 2011
Sep. 30, 2011
Series A Cumulative Preferred Stock
Oil and natural gas properties, excluded from amortization (in dollars)$ 2,167,513$ 2,940,199 
Cumulative Preferred Stock (as a percent)  8.50%
Preferred stock, par value (in dollars per share)$ 0.001$ 0.001 
Preferred stock, shares authorized5,000,0005,000,0001,000,000
Preferred stock, shares issued  282,255
Preferred stock, shares outstanding  282,255
Preferred stock, liquidation preference shares (in dollars per share)  $ 25.00
Common stock, par value (in dollars per share)$ 0.001$ 0.001 
Common stock, shares authorized100,000,000100,000,000 
Common stock, shares issued28,570,91828,570,918 
Common stock, shares outstanding27,782,71827,612,916 
Treasury stock, shares788,200788,200