Schedule of Undiscounted Amounts of Estimated Cash Flows, 5 Years (Details)	12 Months Ended
	Jul. 31, 2015 USD ($)
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 1	$ 340,827
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 2	1,280,989
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 3	635,932
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 4	0
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 5	0
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 6	4,343,120
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 7	$ 6,600,868