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Loss Per Share (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 | Mar. 31, 2014
Basic Loss per Share: |  |  |  |
Net loss attributable to common stock, Per Share | $ (0.09)us-gaap_EarningsPerShareBasic | $ (0.18)us-gaap_EarningsPerShareBasic | $ (0.53)us-gaap_EarningsPerShareBasic | $ (2.24)us-gaap_EarningsPerShareBasic
Net loss for the period | $ (2,044,606)us-gaap_ProfitLoss |  |  |
Diluted Loss per Share: |  |  |  |
Net loss attributable to common stock, Per Share | $ (0.09)us-gaap_EarningsPerShareDiluted | $ (0.18)us-gaap_EarningsPerShareDiluted | $ (0.53)us-gaap_EarningsPerShareDiluted | $ (2.24)us-gaap_EarningsPerShareDiluted
Net Income (Loss) Attributable to Parent | $ (346,186)us-gaap_NetIncomeLoss | $ (679,524)us-gaap_NetIncomeLoss | $ (2,044,606)us-gaap_NetIncomeLoss | $ (8,471,985)us-gaap_NetIncomeLoss
Weighted Average Number of Shares Outstanding, Basic and Diluted | 3,873,506 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted | 3,805,539 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted | 3,832,206 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted | 3,774,576 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Options and warrants outstanding | 1,675,999 ctgo_OptionsAndWarrantsOutstanding |  | 1,675,999 ctgo_OptionsAndWarrantsOutstanding |
2010 Plan [Member] | Equity Option [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |  | 1,692,666 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_StockOptionMember / us-gaap_PlanNameAxis = ctgo_A2010PlanMember |  | 1,692,666 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_StockOptionMember / us-gaap_PlanNameAxis = ctgo_A2010PlanMember
2010 Plan [Member] | Stock Options [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 445,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = ctgo_A2010PlanMember |  | 445,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = ctgo_A2010PlanMember |

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