Note 4 - Mineral Rights and Properties - Mineral Property Expenditures (Details) - USD ($)	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Mineral Property Expenditures	$ 1,656,516	$ 701,761
Palangana Mine [Member]
Mineral Property Expenditures	245,320	198,802
Goliad Project [Member]
Mineral Property Expenditures	97,454	45,789
Burke Hollow Project [Member]
Mineral Property Expenditures	715,541	129,778
Longhorn Project [Member]
Mineral Property Expenditures	2,921	2,288
Salvo Project [Member]
Mineral Property Expenditures	5,696	8,192
Anderson Project [Member]
Mineral Property Expenditures	16,495	19,466
Workman Creek Project [Member]
Mineral Property Expenditures	8,587	8,198
Slick Rock Project [Member]
Mineral Property Expenditures	13,490	13,136
Reno Creek Project [Member]
Mineral Property Expenditures	199,819	100,490
Yuty Project [Member]
Mineral Property Expenditures	8,045	5,994
Oviedo Project [Member]
Mineral Property Expenditures	182,747	47,611
Alto Parana Titanium Project [Member]
Mineral Property Expenditures	60,858	16,451
Other Property Acquisitions [Member]
Mineral Property Expenditures	$ 99,543	$ 105,566