XML 44 R28.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Costs Incurred (Details) | 3 Months Ended |
--- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Nov. 29, 2010 a
Costs Incurred to acquire and explore mining properties [Line Items] |  |  |
Exploration costs and claim rentals | $ 0 | $ 14,425 |
Total costs incurred | $ 0 | $ 14,425 |
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 |  |
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: |