Schedule of Mineral Rights and Property Acquisition Costs (Details) (USD $)	3 Months Ended
	Oct. 31, 2012
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 1	$ 6,610,453
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 2	6,610,453
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 3	8,689,127
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 4	8,689,127
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 5	1,313,250
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 6	1,313,250
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 7	428,164
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 8	428,164
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 9	363,645
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 10	363,645
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 11	154,774
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 12	154,774
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 13	9,154,268
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 14	9,154,268
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 15	1,187,158
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 16	1,187,158
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 17	257,250
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 18	257,250
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 19	163,213
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 20	163,213
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 21	166,720
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 22	166,720
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 23	11,947,144
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 24	11,947,144
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 25	1,133,412
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 26	1,133,412
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 27	864,498
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 28	857,119
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 29	42,433,076
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 30	42,425,697
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 31	(1,321,032)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 32	(1,057,495)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 33	41,112,044
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 34	41,368,202
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 35	2,345,038
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 36	2,345,038
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 37	(1,463,366)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 38	(1,374,484)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 39	881,672
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 40	970,554
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 41	375,155
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 42	375,155
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 43	(128,370)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 44	(118,991)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 45	246,785
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 46	256,164
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 47	42,240,501
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 48	$ 42,594,920