Schedule of Mineral Rights and Property Acquisition Costs (Details) (USD $)	6 Months Ended
	Jan. 31, 2013
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 1	$ 7,045,457
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	182,500
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 14	0
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 15	9,154,268
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 16	9,154,268
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 17	1,287,158
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 18	1,187,158
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 19	257,250
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 20	257,250
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 21	163,213
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 22	163,213
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 23	166,720
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 24	166,720
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 25	11,947,144
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 26	11,947,144
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 27	1,133,412
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 28	1,133,412
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 29	868,608
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 30	857,119
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 31	43,154,690
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 32	42,425,697
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 33	(1,586,402)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 34	(1,057,495)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 35	41,568,288
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 36	41,368,202
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 37	2,345,038
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 38	2,345,038
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 39	(1,550,581)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 40	(1,374,484)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 41	794,457
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 42	970,554
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 43	375,155
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 44	375,155
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 45	(137,749)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 46	(118,991)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 47	237,406
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 48	256,164
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 49	42,600,151
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 50	$ 42,594,920