Represents the entity’s shares of expenditures, amount.

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

The equity interest of other holders in equity method investment.

+ References

No definition available.

+ Details

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- Definition

The amount of expected cash needed.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of the exploration budget that has been funded as of the specified date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Unbudgeted amount.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Area of land held.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479402/808-10-50-1

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

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- Details

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- Details

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Note 1 - Organization and Business (Details Textual) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024 USD ($) a	Dec. 31, 2023 USD ($)	Jul. 31, 2024 USD ($)	May 17, 2023	Nov. 30, 2022 a
Contango Minerals [Member] \| State of Alaska Mining Claims Located North and Northwest of Tetlin Lease [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	145,280
Contango Minerals [Member] \| State of Alaska Mining Claims Located Near Eagle/Hona Property [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	69,780				69,000
Contango Minerals [Member] \| State of Alaska Mining Claims Located Near Triple Z Property [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	14,800
Contango Minerals [Member] \| State of Alaska Mining Claims Located in Richardson District [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	52,700
Contango Minerals [Member] \| State of Alaska Mining Claims Located North and East of Lucky Shot Property [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	8,000
Alaska Hard Rock Lease [Member] \| Alaska Gold Torrent, LLC [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	8,600
Peak Gold, LLC [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Equity Method Investment, Ownership Percentage	30.00%			30.00%
The Joint Venture Company [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Equity Method Investment, Ownership Percentage	30.00%
Expected Cash Needed \| $	$ 248.1	$ 248.1
Equity Method Investment, Entity Shares of Expenditures, Amount \| $	74.5	$ 74.5
Exploration Budget, Funded Amount \| $	$ 74.5
The Joint Venture Company [Member] \| Subsequent Event [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Exploration Budget, Funded Amount \| $			$ 78.6
Contribution of Unbudgeted Cash \| $			$ 4.1
The Joint Venture Company [Member] \| KG Mining [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Equity Method Investment, Ownership Percentage by Other Owner	70.00%
The Joint Venture Company [Member] \| State of Alaska Mining Claims for Exploration and Development [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	13,000
The Joint Venture Company [Member] \| Tetlin Lease [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Area of Land (Acre)	675,000