Schedule of Asset Retirement Obligation (Details) (USD $)	3 Months Ended
	Oct. 31, 2013
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 1	$ 4,078,080
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 2	3,112,374
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 3	0
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 4	435,758
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 5	0
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 6	435,004
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 7	(12,123)
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 8	(109,916)
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 9	69,231
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 10	204,860
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 11	4,135,187
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 12	4,078,080
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 13	(834,609)
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 14	(836,073)
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 15	3,300,578
Asset Retirement Obligations Schedule Of Asset Retirement Obligation 16	$ 3,242,007