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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	3,873,506us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3,805,539us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3,832,206us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted	3,774,576us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Options and warrants outstanding	1,675,999ctgo_OptionsAndWarrantsOutstanding		1,675,999ctgo_OptionsAndWarrantsOutstanding
2010 Plan [Member] | Equity Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
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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	445,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = ctgo_A2010PlanMember		445,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = ctgo_A2010PlanMember

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