Discount on consideration

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

Fair value of cash payments to acquire mineral properties

+ References

No definition available.

+ Details

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Namespace Prefix:	ncq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Mineral property, fair value of consideration

+ References

No definition available.

+ Details

Name:	ncq_MineralPropertyFairValueOfConsideration
Namespace Prefix:	ncq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Mineral property acquisition

+ References

No definition available.

+ Details

Name:	ncq_MineralPropertyRightOwnershipPercentage
Namespace Prefix:	ncq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Mineral Property, Shares Issued, Shares

+ References

No definition available.

+ Details

Name:	ncq_MineralPropertySharesIssuedShares
Namespace Prefix:	ncq_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Mineral Property, Shares Issued, Value

+ References

No definition available.

+ Details

Name:	ncq_MineralPropertySharesIssuedValue
Namespace Prefix:	ncq_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Net proceeds royalty

+ References

No definition available.

+ Details

Name:	ncq_NetProceedsRoyalty
Namespace Prefix:	ncq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Net smelter return royalty

+ References

No definition available.

+ Details

Name:	ncq_NetSmelterReturnRoyalty
Namespace Prefix:	ncq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Purchase price of the net smelter royalty

+ References

No definition available.

+ Details

Name:	ncq_PurchasePriceOfTheNetSmelterRoyalty
Namespace Prefix:	ncq_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 10
-Paragraph c
-Subparagraph 3(ii)(A)
-Article 4

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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.

+ Details

Name:	us-gaap_ExplorationExpenseMining
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

Name:	us-gaap_StatementScenarioAxis=ncq_ReclassificationAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ncq_MineralPropertyAxis=ncq_AmblerPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ncq_MineralPropertyAxis=ncq_BornitePropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	ncq_MineralPropertyAxis=ncq_TitiribiPropertyMember
Namespace Prefix:
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Mineral properties and development costs (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended			2 Months Ended	3 Months Ended		6 Months Ended		8 Months Ended	12 Months Ended	146 Months Ended
	Oct. 31, 2011	Jan. 31, 2011	Jan. 31, 2010	Aug. 31, 2015	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015	Aug. 05, 2012	Nov. 30, 2015	May 31, 2016	Jun. 19, 2015	Jan. 31, 2012	Oct. 19, 2011	Aug. 05, 2011	Jan. 11, 2010	Dec. 31, 2009
Acquisition costs							$ 0			$ 3,264
Mineral properties expense					$ 611	$ 291	1,278	$ 618
Approximations [Member]
Payments for mineral property											$ 89,500
Acquisition costs											30,600
Mineral properties expense				$ 600							58,900
Reclassification Adjustment [Member]
Mineral properties expense						$ 30		$ 60
Ambler Property [Member]
Mineral property interest percentage																100.00%	51.00%
Mineral Property, Shares Issued, Shares			931,098
Mineral Property, Shares Issued, Value			$ 5,000
Payments for mineral property		$ 12,000
Fair value of cash payments to acquire mineral properties		$ 11,100											$ 10,300
Discount rate used		8.00%
Mineral property, fair value of consideration									$ 26,600
Transaction costs															$ 100
Net smelter return royalty																1.00%
Purchase price of the net smelter royalty																$ 10,000
Bornite Property [Member]
Payments for mineral property	$ 4,000
Net proceeds royalty														15.00%
Discount on consideration					$ 40,000		40,000				$ 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%
Titiribi Property [Member]
Mineral property interest percentage												100.00%
Acquisition costs							$ 0			$ 3,264