Note 4 - Mineral Rights and Properties - Mineral Property Expenditures (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Mineral Property Expenditures	$ 961,257	$ 1,323,323	$ 1,663,018	$ 2,846,774
Palangana Mine [Member]
Mineral Property Expenditures	232,866	528,699	431,668	848,726
Goliad Project [Member]
Mineral Property Expenditures	71,267	36,843	117,056	96,807
Burke Hollow Project [Member]
Mineral Property Expenditures	185,838	220,812	315,616	869,673
Longhorn Project [Member]
Mineral Property Expenditures	2,289	2,289	4,577	12,446
Salvo Project [Member]
Mineral Property Expenditures	7,673	6,702	15,865	13,970
Anderson Project [Member]
Mineral Property Expenditures	19,425	13,433	38,891	29,486
Workman Creek Project [Member]
Mineral Property Expenditures	8,167	8,168	16,365	16,365
Slick Rock Project [Member]
Mineral Property Expenditures	12,993	13,271	26,129	26,405
Reno Creek Project [Member]
Mineral Property Expenditures	169,576	144,181	270,066	292,224
Yuty Project [Member]
Mineral Property Expenditures	8,334	16,718	14,328	30,914
Oviedo Project [Member]
Mineral Property Expenditures	98,804	123,117	146,415	229,055
Alto Parana Titanium Project [Member]
Mineral Property Expenditures	29,463	110,085	45,914	166,333
Other Property Acquisitions [Member]
Mineral Property Expenditures	$ 114,562	$ 99,005	$ 220,128	$ 214,370