Note 3 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) - USD ($)	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Mineral Properties, Gross	$ 67,581,387	$ 67,451,387
Accumulated Depletion	(3,929,884)	(3,929,884)
Mineral Properties Excluding Mineral Rights, Net	63,651,503	63,521,503
Mineral Properties, Net, Total	63,655,503	63,536,895
Palangana Mine [Member]
Mineral Properties, Gross	6,027,784	6,027,784
Goliad Project [Member]
Mineral Properties, Gross	8,689,127	8,689,127
Burke Hollow Project [Member]
Mineral Properties, Gross	1,495,750	1,495,750
Longhorn Project [Member]
Mineral Properties, Gross	116,870	116,870
Salvo Project [Member]
Mineral Properties, Gross	14,905	14,905
Anderson Project [Member]
Mineral Properties, Gross	3,470,373	3,470,373	$ 9,154,268
Workman Creek Project [Member]
Mineral Properties, Gross	799,854	699,854
Los Cuatros Project [Member]
Mineral Properties, Gross	257,250	257,250
Slick Rock Project [Member]
Mineral Properties, Gross	30,000
Reno Creek Project [Member]
Mineral Properties, Gross	31,527,870	31,527,870
Diabase Project [Member]
Mineral Properties, Gross	546,938	546,938
Yuty Project [Member]
Mineral Properties, Gross	11,947,144	11,947,144
Oviedo Project [Member]
Mineral Properties, Gross	1,133,412	1,133,412
Alto Parana Titanium Project [Member]
Mineral Properties, Gross	1,433,030	1,433,030
Other Property Acquisitions [Member]
Mineral Properties, Gross	91,080	91,080
Mineral Rights, Databases [Member]
Mineral rights, gross	2,410,038	2,410,038
Accumulated Amortization	(2,410,038)	(2,409,188)
Mineral Rights		850
Land Use Agreements [Member]
Mineral rights, gross	48,770	404,310
Accumulated Amortization	(44,770)	(389,768)
Mineral Rights	$ 4,000	$ 14,542