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Supplemental Disclosure of Cash Flow Information (Details) (USD $)
 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Supplemental Disclosure of Cash Flow Information      
Income taxes paid $ 895,000 $ 229,802 $ 329,800
Income tax refunds and net operating loss carry-back received   979,177 2,095,126
Non-cash transactions:      
Change in accounts payable used to acquire oil and natural gas leasehold interests and develop oil and natural gas properties (196,396) (91,483) (62,532)
Change in due to joint venture partner used to acquire oil and natural gas leasehold interests and develop oil and natural gas properties 1,958,029    
Accrued advance in due to joint venture partner 1,142,715    
Oil and natural gas property costs attributable to the recognition of asset retirement obligations 93,522 15,000 85,871
Windfall tax benefit recognized in income taxes recoverable     $ 173,157