Note 4 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) - USD ($)	Jul. 31, 2021	Jul. 31, 2020	Jul. 30, 2020
Mineral Properties	$ 67,711,387	$ 67,581,387
Accumulated Depletion	(3,929,884)	(3,929,884)
Mineral Properties Excluding Mineral Rights, Net	63,781,503	63,651,503
Mineral Properties, Net, Total	63,784,003	63,655,503	$ 63,655,503
Palangana Mine [Member]
Mineral Properties	6,027,784	6,027,784
Goliad Project [Member]
Mineral Properties	8,689,127	8,689,127
Burke Hollow Project [Member]
Mineral Properties	1,495,750	1,495,750
Longhorn Project [Member]
Mineral Properties	116,870	116,870
Salvo Project [Member]
Mineral Properties	14,905	14,905
Anderson Project [Member]
Mineral Properties	3,470,373	3,470,373
Workman Creek Project [Member]
Mineral Properties	899,854	799,854
Los Cuatros Project [Member]
Mineral Properties	257,250	257,250
Slick Rock Project [Member]
Mineral Properties	60,000	30,000
Reno Creek Project [Member]
Mineral Properties	31,527,870	31,527,870
Diabase Project [Member]
Mineral Properties	546,938	546,938
Yuty Project [Member]
Mineral Properties	11,947,144	11,947,144
Oviedo Project [Member]
Mineral Properties	1,133,412	1,133,412
Alto Parana Titanium Project [Member]
Mineral Properties	1,433,030	1,433,030
Other Property Acquisitions [Member]
Mineral Properties	91,080	91,080
Mineral Rights Databases and Land Use Agreements [Member]
Databases and Land Use Agreements	2,458,808	2,458,808
Mineral Rights, Databases [Member]
Accumulated Amortization	(2,456,308)	(2,454,808)
Mineral Rights	2,500	4,000
Land Use Agreements [Member]
Mineral Properties, Net, Total	$ 63,784,003	$ 63,655,503