Schedule of Undiscounted Amounts of Estimated Cash Flows, 5 Years (Details)	3 Months Ended
	Oct. 31, 2015 USD ($)
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	451,488
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 3	996,388
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 4	677,387
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 5	132,486
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 6	4,343,119
Asset Retirement Obligations Schedule Of Undiscounted Amounts Of Estimated Cash Flows, 5 Years 7	$ 6,600,868