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Note 5 - Prepaid Expenses and Other | 9 Months Ended
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Mar. 31, 2019
Notes to Financial Statements |
Prepaid Expenses [Text Block] | 5. Prepaid Expenses and other The Company has prepaid expenses of $197,578 and $155,671 as of March 31, 2019 and June 30, 2018, respectively. Prepaid expenses primarily relate to prepaid insurance and management fees.

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- Definition The complete disclosure for prepaid expenses. + References No definition available. + Details
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Namespace Prefix: | ctgo_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration