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v2.4.1.9

Commitments and Contingencies Claim Rentals (Details) (USD $) | 9 Months Ended
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Mar. 31, 2015
Tetlin Lease [Member] |
Claim Rentals [Line Items] |
Contractual Annual Exploration Costs | 350,000 ctgo_ContractualAnnualExplorationCosts / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember
Gold Properties [Member] |
Claim Rentals [Line Items] |
Annual claim rentals | 94,815 ctgo_AnnualClaimRentals / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_GoldPropertiesMember
Native Village of Tetlin Land [Member] |
Claim Rentals [Line Items] |
Initial and Renewal Terms of Leases and Concessions on Undeveloped Acreage | 10 years

X
- Definition Annual Claim Rentals + References No definition available. + Details
Name: | ctgo_AnnualClaimRentals
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ctgo_ClaimRentalsLineItems
Namespace Prefix: | ctgo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual Annual Exploration Costs + References No definition available. + Details
Name: | ctgo_ContractualAnnualExplorationCosts
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=ctgo_GoldPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=ctgo_TetlinLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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