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Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 30, 2012
Jun. 30, 2012
Oil and natural gas properties, excluded from amortization (in dollars) 7,782,060 6,042,094
Preferred stock, par value (in dollars per share) 0.001 0.001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, liquidation preference (in dollars per share) 25.00 25.00
Common stock, par value (in dollars per share) 0.001 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, issued shares 28,840,163 28,670,424
Common stock, outstanding shares 28,051,963 27,882,224
Treasury stock, shares 788,200 788,200
Series A Cumulative Preferred Stock
    
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 317,319 317,319
Preferred stock, shares outstanding 317,319 317,319