XML 30 R36.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Commitments and Contingencies Royalties (Details) (USD $) | 1 Months Ended | 3 Months Ended | 13 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2011 | Jun. 30, 2011 | Dec. 31, 2012 | Jun. 30, 2012 | Mar. 31, 2015 | Mar. 31, 2014 | Jul. 15, 2012 | May 31, 2011 | Nov. 29, 2010 acre | Sep. 29, 2014
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of Acreage Available for Renewal |  |  |  |  | 50.00%ctgo_PercentageOfAcreageAvailableForRenewal | 50.00%ctgo_PercentageOfAcreageAvailableForRenewal |  |  |  |
Payment by Lessee to Remove Acreage Renewal Restriction |  |  | $ 200,000 ctgo_PaymentByLesseeToRemoveAcreageRenewalRestriction |  |  |  |  |  |  |
Payment to Tetlin to reduce royalty rate | 150,000 ctgo_PaymentByLeasorToReduceRoyaltyRate | 75,000 ctgo_PaymentByLeasorToReduceRoyaltyRate |  |  |  |  |  |  |  |
Decrease in royalty rates | 0.50%ctgo_DecreaseInRoyaltyRates | 0.25%ctgo_DecreaseInRoyaltyRates |  |  |  |  |  |  |  |
Deposit On Advance Minimum Royalty |  |  |  |  | 40,000 ctgo_DepositOnAdvanceMinimumRoyalty |  |  |  |  |
Advance Minimum Royalty |  |  |  |  | 75,000 ctgo_AdvanceMinimumRoyalty |  |  |  |  |
Tetlin Lease [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual annual exploration costs |  |  |  |  | 350,000 ctgo_ContractualAnnualExplorationCosts / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember |  |  |  |  |
Payment to Tetlin to reduce royalty rate |  |  |  | 225,000 ctgo_PaymentByLeasorToReduceRoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember |  |  |  |  |  |
Decrease in royalty rates |  |  |  |  | 0.75%ctgo_DecreaseInRoyaltyRates / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember |  |  |  |  |
Tetlin Lease [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Royalty rate | 1.25%ctgo_RoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  | 2.00%ctgo_RoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Advance royalties |  |  |  |  | 50,000 ctgo_OilAndGasAdvanceRoyalties / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  | 75,000 ctgo_OilAndGasAdvanceRoyalties / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |
Tetlin Lease [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Royalty rate | 4.25%ctgo_RoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  | 5.00%ctgo_RoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Tetlin Lease [Member] | Scenario 1 [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in royalty rates |  |  |  |  | 0.25%ctgo_IncreaseInRoyaltyRates / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_StatementScenarioAxis = ctgo_Scenario1Member |  |  |  |  |
Payment by Tetlin to increase royalty rate |  |  |  |  | 150,000 ctgo_PaymentByLeaseeToIncreaseRoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_StatementScenarioAxis = ctgo_Scenario1Member |  |  |  |  |
Tetlin Lease [Member] | Scenario 2 [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in royalty rates |  |  |  |  | 0.50%ctgo_IncreaseInRoyaltyRates / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_StatementScenarioAxis = ctgo_Scenario2Member |  |  |  |  |
Payment by Tetlin to increase royalty rate |  |  |  |  | 300,000 ctgo_PaymentByLeaseeToIncreaseRoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_StatementScenarioAxis = ctgo_Scenario2Member |  |  |  |  |
Tetlin Lease [Member] | Scenario 3 [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Increase in royalty rates |  |  |  |  | 0.75%ctgo_IncreaseInRoyaltyRates / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_StatementScenarioAxis = ctgo_Scenario3Member |  |  |  |  |
Payment by Tetlin to increase royalty rate |  |  |  |  | $ 450,000 ctgo_PaymentByLeaseeToIncreaseRoyaltyRate / us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis = ctgo_TetlinLeaseMember / us-gaap_StatementScenarioAxis = ctgo_Scenario3Member |  |  |  |  |
JEX [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Overriding royalty interest |  |  |  |  | 3.00%ctgo_OverridingRoyaltyInterest / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ctgo_JexMember |  |  |  |  |
Native Village of Tetlin Land [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Leasehold Interest Acreage |  |  |  |  |  |  |  |  | 675,000 ctgo_LeaseholdInterestAcreage / us-gaap_StatementGeographicalAxis = ctgo_NativeVillageOfTetlinLandMember |
ALASKA | JEX [Member] |  |  |  |  |  |  |  |  |  |
Royalties [Line Items] |  |  |  |  |  |  |  |  |  |
Overriding royalty interest |  |  |  |  | 2.00%ctgo_OverridingRoyaltyInterest / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ctgo_JexMember / us-gaap_StatementGeographicalAxis = stpr_AK |  |  |  |  | 2.00%ctgo_OverridingRoyaltyInterest / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = ctgo_JexMember / us-gaap_StatementGeographicalAxis = stpr_AK

X
- Definition Advance Minimum Royalty + References No definition available. + Details
Name: | ctgo_AdvanceMinimumRoyalty
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Decrease in Royalty Rates + References No definition available. + Details
Name: | ctgo_DecreaseInRoyaltyRates
Namespace Prefix: | ctgo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Deposit On Advance Minimum Royalty + References No definition available. + Details
Name: | ctgo_DepositOnAdvanceMinimumRoyalty
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Increase in Royalty Rates + References No definition available. + Details
Name: | ctgo_IncreaseInRoyaltyRates
Namespace Prefix: | ctgo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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
- Definition Oil and Gas, Advance Royalties + References No definition available. + Details
Name: | ctgo_OilAndGasAdvanceRoyalties
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Overriding Royalty Interest + References No definition available. + Details
Name: | ctgo_OverridingRoyaltyInterest
Namespace Prefix: | ctgo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Payment by Leasee to Increase Royalty Rate + References No definition available. + Details
Name: | ctgo_PaymentByLeaseeToIncreaseRoyaltyRate
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Payment by Leasor to Reduce Royalty Rate + References No definition available. + Details
Name: | ctgo_PaymentByLeasorToReduceRoyaltyRate
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Payment by Lessee to Remove Acreage Renewal Restriction + References No definition available. + Details
Name: | ctgo_PaymentByLesseeToRemoveAcreageRenewalRestriction
Namespace Prefix: | ctgo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of Acreage Available for Renewal + References No definition available. + Details
Name: | ctgo_PercentageOfAcreageAvailableForRenewal
Namespace Prefix: | ctgo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Royalty Rate + References No definition available. + Details
Name: | ctgo_RoyaltyRate
Namespace Prefix: | ctgo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ctgo_JexMember
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: |

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