Schedule of Mineral Rights and Property Acquisition Costs (Details)	12 Months Ended
	Jul. 31, 2015 USD ($)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 1	$ 6,587,135
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 2	6,664,260
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	1,495,750
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 6	1,495,750
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 7	116,870
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 8	116,870
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 9	14,905
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 10	364,710
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	1,472,008
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 16	1,372,008
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	661,271
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 20	661,271
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 21	11,947,144
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 22	11,947,144
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 23	1,133,412
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 24	1,133,412
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 25	285,741
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 26	262,115
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 27	41,969,655
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 28	42,272,959
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 29	(3,929,884)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 30	(3,454,533)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 31	38,039,771
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 32	38,818,426
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 33	2,410,038
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 34	2,405,038
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 35	(2,166,966)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 36	(1,928,901)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 37	243,072
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 38	476,137
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 39	390,155
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 40	390,155
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 41	(235,031)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 42	(196,019)
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 43	155,124
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 44	194,136
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 45	38,437,967
Mineral Rights And Properties Schedule Of Mineral Rights And Property Acquisition Costs 46	$ 39,488,699