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Note 4 - Mineral Rights and Properties - Mineral Property Expenditures (Details) - USD ($) | 12 Months Ended
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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

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- Definition Amount of mineral property expenditures. + References No definition available. + Details
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