Discount on consideration

No definition available.

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- Definition

The maximum subscription price to be paid under the option agreement.

+ References

No definition available.

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- Definition

Mineral property, fair value of consideration

+ References

No definition available.

+ Details

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- Definition

Mineral property acquisition

+ References

No definition available.

+ Details

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- Definition

Net proceeds royalty

+ References

No definition available.

+ Details

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- Definition

Net smelter return royalty

+ References

No definition available.

+ Details

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- Definition

Purchase price of the net smelter royalty

+ References

No definition available.

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- Definition

The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10(c)(7)(ii))
-URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10(c)(3)(ii)(A))
-URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862

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- Definition

Exploration expenses (including prospecting) related to the mining industry would be included in operating expenses. Exploration costs include costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of mineral reserves.

+ References

No definition available.

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- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Costs incurred and are directly related to generating maintenance revenues. Also includes cost of maintenance on client contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(e))
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- Definition

The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
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-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

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- Definition

The cash inflow from an entity that is affiliated with the entity by means of direct or indirect ownership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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-Publisher FASB
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-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

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- Definition

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Mineral properties and development costs (Narrative) (Details) - USD ($) $ in Thousands			1 Months Ended		3 Months Ended		6 Months Ended		150 Months Ended
	Apr. 10, 2017	Jan. 11, 2010	Oct. 31, 2011	Oct. 19, 2011	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016	May 31, 2017
Mineral properties expense					$ 1,297	$ 457	$ 1,936	$ 990
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 150,000
Maximum Subscription Price	5,000
Maintenance Costs	10,000
Proceeds from Contributions from Affiliates	$ 10,000						10,000	$ 0
Security Deposit					$ 9,300		$ 9,300		$ 9,300
Approximations
Payments for mineral property									95,500
Acquisition costs									30,600
Mineral properties expense									$ 64,900
Bornite Property [Member]
Payments for mineral property			$ 4,000
Net proceeds royalty				15.00%
Discount on consideration				$ 40,000
Bornite Property [Member] \| Minimum [Member]
Mineral property interest percentage				16.00%
Net smelter return royalty				1.00%
Bornite Property [Member] \| Maximum [Member]
Mineral property interest percentage				25.00%
Net smelter return royalty				2.50%
Ambler Property [Member]
Mineral property interest percentage		100.00%
Mineral property, fair value of consideration		$ 26,600
Net smelter return royalty		1.00%
Purchase price of the net smelter royalty		$ 10,000