XML 42 R28.htm IDEA: XBRL DOCUMENT v3.4.0.3

Costs Incurred (Details)	3 Months Ended		9 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Nov. 29, 2010 a
Costs Incurred to acquire and explore mining properties [Line Items]
Exploration costs and claim rentals	$ 0	$ 180,791	$ 14,425	$ 475,527
Total costs incurred	$ 0	$ 180,791	$ 14,425	$ 475,527
Native Village of Tetlin Land [Member]
Costs Incurred to acquire and explore mining properties [Line Items]
Initial and Renewal Terms of Leases and Concessions on Undeveloped Acreage	10 years		10 years
Leasehold Interest Acreage | a					675,000

X

- Definition

[Line Items] for Costs Incurred to acquire and explore mining properties [Table]

+ References

No definition available.

+ Details

Name:	ctgo_CostsIncurredtoacquireandexploreminingpropertiesLineItems
Namespace Prefix:	ctgo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The sum of the both capitalized costs incurred and costs expensed during the period of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs for mining properties.

+ References

No definition available.

+ Details

Name:	ctgo_CostsOfUnprovedPropertiesExcludedFromAmortizationMiningPropertiesPeriodCost
Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Exploration expenses (including prospecting) and claim rentals 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:	ctgo_ExplorationCostsAndClaimRentalsMiningPropertiesPeriodCost
Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Initial & Renewal Terms of Leases and Concessions on Undeveloped Acreage

+ References

No definition available.

+ Details

Name:	ctgo_InitialAndRenewalTermsOfLeasesAndConcessionsOnUndevelopedAcreage
Namespace Prefix:	ctgo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Leasehold Interest Acreage

+ References

No definition available.

+ Details

Name:	ctgo_LeaseholdInterestAcreage
Namespace Prefix:	ctgo_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_StatementGeographicalAxis=ctgo_NativeVillageOfTetlinLandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: