Schedule of Undiscounted Amounts of Estimated Cash Flows, 5 Years (Details) (USD $)	9 Months Ended
	Apr. 30, 2014
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 1	$ 0
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 2	681,655
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 3	0
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 4	940,161
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 5	635,932
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 6	4,124,801
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 7	$ 6,382,549