The area of drilling completed.

No definition available.

Name:	ctgo_AreaOfDrillingCompleted
Namespace Prefix:	ctgo_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents Contango’s shares of expenditures, amount.

+ References

No definition available.

+ Details

Name:	ctgo_EquityMethodInvestmentContangosSharesOfExpendituresAmount
Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The equity interest of other holders in equity method investment.

+ References

No definition available.

+ Details

Name:	ctgo_EquityMethodInvestmentOwnershipPercentageByOtherOwner
Namespace Prefix:	ctgo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of expected cash needed.

+ References

No definition available.

+ Details

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

- Definition

Represents expected spending next fiscal year.

+ References

No definition available.

+ Details

Name:	ctgo_ExpectedSpendingNextFiscalYear
Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of the exploration budget that has been spent.

+ References

No definition available.

+ Details

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

- Definition

Represents an entity's ownership percentage in a company as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	ctgo_PercentageOwnershipInCompany
Namespace Prefix:	ctgo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=ctgo_TheJointVentureCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ctgo_StateOfAlaskaMiningClaimsForExplorationAndDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dei_LegalEntityAxis=ctgo_ContangoMineralsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ctgo_StateOfAlaskaMiningClaimsLocatedNorthAndNorthwestOfTetlinLeaseMember
Namespace Prefix:
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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ctgo_StateOfAlaskaMiningClaimsLocatedNearEaglehonaPropertyMember
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Data Type:	na
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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ctgo_StateOfAlaskaMiningClaimsLocatedNearTripleZPropertyMember
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Data Type:	na
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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ctgo_StateOfAlaskaMiningClaimsLocatedInRichardsonDistrictMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ctgo_StateOfAlaskaMiningClaimsLocatedNorthAndEastOfLuckyShotPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseContractualTermAxis=ctgo_TetlinLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseContractualTermAxis=ctgo_AlaskaHardRockLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ctgo_AlaskaGoldTorrentLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ctgo_TheJointVentureCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_CounterpartyNameAxis=ctgo_KGMiningMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	dei_LegalEntityAxis=ctgo_COREAlaskaMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dei_LegalEntityAxis=ctgo_KGMiningMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	dei_LegalEntityAxis=ctgo_RoyalAlaskaLLCMember
Namespace Prefix:
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- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ctgo_RoyalAlaskaLLCMember
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Note 1 - Organization and Business (Details Textual) $ in Millions		3 Months Ended
	Dec. 17, 2021 USD ($)	Mar. 31, 2022 USD ($) a ft²	Feb. 14, 2022 USD ($)	Oct. 01, 2020	Sep. 30, 2020	Sep. 29, 2020
The Joint Venture Company [Member] \| State of Alaska Mining Claims for Exploration and Development [Member]
Area of Land (Acre)		13,000
Contango Minerals [Member] \| State of Alaska Mining Claims Located North and Northwest of Tetlin Lease [Member]
Area of Land (Acre)		214,600
Contango Minerals [Member] \| State of Alaska Mining Claims Located Near Eagle/Hona Property [Member]
Area of Land (Acre)		139,100
Contango Minerals [Member] \| State of Alaska Mining Claims Located Near Triple Z Property [Member]
Area of Land (Acre)		14,800
Contango Minerals [Member] \| State of Alaska Mining Claims Located in Richardson District [Member]
Area of Land (Acre)		52,700
Contango Minerals [Member] \| State of Alaska Mining Claims Located North and East of Lucky Shot Property [Member]
Area of Land (Acre)		8,000
Tetlin Lease [Member] \| The Joint Venture Company [Member]
Area of Land (Acre)		675,000
Alaska Hard Rock Lease [Member] \| Alaska Gold Torrent, LLC [Member]
Area of Land (Acre)		8,600
The Joint Venture Company [Member]
Equity Method Investment, Ownership Percentage		30.00%			30.00%	30.00%
Exploration Budget, Amount Spent \| $		$ 15.8
Area of Drilling Completed (Square Foot) \| ft²		33,000
Expected Cash Needed \| $	$ 47.9
Expected Spending Next Fiscal Year \| $			$ 26.0
Equity Method Investment, Contango’s Shares of Expenditures, Amount \| $			$ 7.8
The Joint Venture Company [Member] \| KG Mining [Member]
Equity Method Investment, Ownership Percentage by Other Owner					70.00%
The Joint Venture Company [Member] \| CORE Alaska [Member]
Equity Method Investment, Ownership Percentage					30.00%
Percentage Ownership in Company				30.00%
The Joint Venture Company [Member] \| KG Mining [Member]
Percentage Ownership in Company				70.00%
The Joint Venture Company [Member] \| Royal Alaska LLC [Member]
Equity Method Investment, Ownership Percentage					40.00%
Royal Alaska LLC [Member] \| KG Mining [Member]
Percentage Ownership in Company					100.00%