Note 5 - Mineral Rights and Properties - Mineral Property Expenditures (Details) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Mineral Property Expenditures	$ 2,912,518	$ 1,478,754	$ 6,678,207	$ 3,141,772
Palangana Mine [Member]
Mineral Property Expenditures	299,727	216,791	811,443	648,459
Burke Hollow Project [Member]
Mineral Property Expenditures	938,789	626,695	2,356,485	942,311
Goliad Project [Member]
Mineral Property Expenditures	42,230	51,437	171,670	168,493
Longhorn Project [Member]
Mineral Property Expenditures	15,381	2,289	22,831	6,866
Salvo Project [Member]
Mineral Property Expenditures	4,452	7,672	14,601	23,537
Anderson Project [Member]
Mineral Property Expenditures	27,335	19,469	59,944	58,360
Workman Creek Project [Member]
Mineral Property Expenditures	8,167	8,168	24,922	24,533
Slick Rock Project [Member]
Mineral Property Expenditures	12,993	12,994	39,477	39,123
Reno Creek Project [Member]
Mineral Property Expenditures	258,606	215,725	682,758	485,791
Allemand Ross Project [Member]
Mineral Property Expenditures	90,387	0	139,276	0
Christensen Ranch Mine [Member]
Mineral Property Expenditures	513,663	0	776,890	0
Ludeman Project [Member]
Mineral Property Expenditures	78,680	0	124,957	0
Moore Ranch Project [Member]
Mineral Property Expenditures	55,982	0	74,529	0
Yuty Project [Member]
Mineral Property Expenditures	33,349	7,129	53,961	21,457
Oviedo Project [Member]
Mineral Property Expenditures	145,853	109,676	468,447	256,091
Alto Parana Titanium Project [Member]
Mineral Property Expenditures	76,925	88,796	281,577	134,710
Other Property Acquisitions [Member]
Mineral Property Expenditures	$ 309,999	$ 111,913	$ 574,439	$ 332,041