Note 4 - Mineral Rights and Properties - Mineral Property Expenditures (Details) - USD ($)	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Mineral Property Expenditures	$ 4,478,807	$ 4,582,403
Palangana Mine [Member]
Mineral Property Expenditures	889,597	1,342,927
Goliad Project [Member]
Mineral Property Expenditures	237,515	190,278
Burke Hollow Project [Member]
Mineral Property Expenditures	1,445,797	1,130,467
Longhorn Project [Member]
Mineral Property Expenditures	9,154	17,023
Salvo Project [Member]
Mineral Property Expenditures	31,209	28,318
Anderson Project [Member]
Mineral Property Expenditures	78,601	71,170
Workman Creek Project [Member]
Mineral Property Expenditures	32,700	32,700
Slick Rock Project [Member]
Mineral Property Expenditures	52,117	52,521
Reno Creek Project [Member]
Mineral Property Expenditures	672,225	596,551
Yuty Project [Member]
Mineral Property Expenditures	31,279	65,679
Oviedo Project [Member]
Mineral Property Expenditures	371,966	350,211
Alto Parana Titanium Project [Member]
Mineral Property Expenditures	198,969	230,350
Other Property Acquisitions [Member]
Mineral Property Expenditures	$ 427,678	$ 474,208