XML 52 R27.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Other Assets (Details) (USD $) | 1 Months Ended | 13 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2011 | Jun. 30, 2011 | Jun. 30, 2012 | Mar. 31, 2015 | May 31, 2011
Royalties [Line Items] |  |  |  |  |
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 |  |  |
Tetlin Lease [Member] |  |  |  |  |
Royalties [Line Items] |  |  |  |  |
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
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 |

X
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- Definition Increase in Royalty Rates + References No definition available. + Details
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- Definition Royalty Rate + References No definition available. + Details
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- Details
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Period Type: |