Note 3 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) - USD ($)	Oct. 31, 2019	Jul. 31, 2019
Mineral Properties	$ 67,451,387	$ 67,451,387
Accumulated Depletion	(3,929,884)	(3,929,884)
	63,521,503	63,521,503
	63,534,003	63,536,895
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	699,854	699,854
Los Cuatros Project [Member]
Mineral Properties	257,250	257,250
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 [Member]
Mineral rights, gross	2,410,038	2,410,038
Accumulated Amortization	(2,409,437)	(2,409,188)
	601	850
Land Use Agreements [Member]
Mineral rights, gross	404,310	404,310
Accumulated Amortization	(392,411)	(389,768)
	$ 11,899	$ 14,542