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Consolidated Condensed Balance Sheets (Parenthetical) (USD $)
 9 Months Ended 12 Months Ended
Mar. 31, 2013
Jun. 30, 2012
Oil and natural gas properties, excluded from amortization (in dollars) 5,349,286 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 29,190,858 28,670,424
Common stock, outstanding shares 28,400,041 27,882,224
Treasury stock, shares 790,817 788,200
Series A Cumulative Preferred Stock
    
Cumulative Preferred Stock (as a percent) 8.50% 8.50%
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