Note 5 - Mineral Rights and Properties - Mineral Rights and Property Acquisition Costs (Details) - USD ($)	Jul. 31, 2019	Jul. 31, 2018
Mineral Rights and Properties
Mineral Properties, Gross	$ 67,451,387	$ 74,997,692
Accumulated Depletion	(3,929,884)	(3,929,884)
	63,521,503	71,067,808
	63,536,895	71,122,576
Palangana Mine [Member]
Mineral Rights and Properties
Mineral Properties, Gross	6,027,784	6,285,898
Goliad Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	8,689,127	8,689,127
Burke Hollow Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	1,495,750	1,495,750
Longhorn Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	116,870	116,870
Salvo Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	14,905	14,905
Anderson Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	3,470,373	9,154,268
Workman Creek Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	699,854	1,657,500
Los Cuatros Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	257,250	257,250
Slick Rock Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross		646,650
Reno Creek Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	31,527,870	31,527,870
Diabase Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	546,938	546,938
Yuty Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	11,947,144	11,947,144
Oviedo Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	1,133,412	1,133,412
Alto Parana Titanium Project [Member]
Mineral Rights and Properties
Mineral Properties, Gross	1,433,030	1,433,030
Other Property Acquisitions [Member]
Mineral Rights and Properties
Mineral Properties, Gross	91,080	91,080
Mineral Rights, Databases [Member]
Mineral Rights and Properties
Mineral rights, gross	2,410,038	2,410,038
Accumulated Amortization	(2,409,188)	(2,405,192)
	850	4,846
Land Use Agreements [Member]
Mineral Rights and Properties
Mineral rights, gross	404,310	404,310
Accumulated Amortization	(389,768)	(354,388)
	$ 14,542	$ 49,922

Mineral properties excluding mineral rights, net of accumulated depletion.

No definition available.

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- Definition

The accumulated decrease in the carrying value of the mineral rights.

+ References

No definition available.

+ Details

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- Definition

Mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, gross.

+ References

No definition available.

+ Details

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- Definition

The accumulated decrease in the carrying value of the mineral properties as a result of mine or mineral production.

+ References

No definition available.

+ Details

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- Definition

Carrying amount at the balance sheet date of mineral properties, gross of adjustments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
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-Topic 932
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-URI http://asc.fasb.org/extlink&oid=96866604&loc=d3e64895-109465

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- Definition

Mineral properties, net of adjustments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 360
-Section 25
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- Definition

Carrying amount at the balance sheet date of mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, net of amortization.

+ References

No definition available.

+ Details

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