Note 3 - Mineral Rights and Properties - Mineral Property Expenditures (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Mineral Property Expenditures	$ 1,323,323	$ 899,217	$ 2,846,774	$ 1,765,460
Palangana Mine [Member]
Mineral Property Expenditures	528,699	246,592	848,726	526,624
Goliad Project [Member]
Mineral Property Expenditures	36,843	19,056	96,807	37,878
Burke Hollow Project [Member]
Mineral Property Expenditures	220,812	166,469	869,673	275,014
Longhorn Project [Member]
Mineral Property Expenditures	2,289	10,157	12,446	25,533
Salvo Project [Member]
Mineral Property Expenditures	6,702	6,702	13,970	13,510
Anderson Project [Member]
Mineral Property Expenditures	13,433	15,056	29,486	37,270
Workman Creek Project [Member]
Mineral Property Expenditures	8,168	7,673	16,365	15,364
Slick Rock Project [Member]
Mineral Property Expenditures	13,271	12,206	26,405	29,430
Reno Creek Project [Member]
Mineral Property Expenditures	144,181	147,418	292,224	295,294
Yuty Project [Member]
Mineral Property Expenditures	16,718	62,600	30,914	86,003
Oviedo Project [Member]
Mineral Property Expenditures	123,117	40,758	229,055	61,483
Alto Parana Titanium Project [Member]
Mineral Property Expenditures	110,085	34,429	166,333	60,262
Other Property Acquisitions [Member]
Mineral Property Expenditures	$ 99,005	$ 130,101	$ 214,370	$ 301,795