XML 90 R42.htm IDEA: XBRL DOCUMENT v3.25.1

Note 3 - Liquidity (Details Textual) - USD ($)		1 Months Ended			3 Months Ended		6 Months Ended	12 Months Ended
	Feb. 18, 2025	Jan. 31, 2025	Sep. 30, 2024	Jul. 31, 2024	Mar. 31, 2027	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2023
Schedule Of Liquidity [Line Items]
Principal payments							$ 0	$ 7,900,000	$ 0	$ 0
Subsequent Event [Member]
Schedule Of Liquidity [Line Items]
Principal payments	$ 10,600,000	$ 13,800,000
Outstanding Principal Balance		38,300,000
The Joint Venture Company [Member]
Schedule Of Liquidity [Line Items]
Exploration Budget, Funded Amount						$ 78,600,000		78,600,000
Exploration budget funded amount for next fiscal year						0		0
Exploration budget amount funded by the company for next fiscal year						31,300,000		31,300,000
Distributions from exploration			$ 19,500,000
Cash distribution relating to production						21,000,000
Cash distributions received				$ 40,500,000
Repayment obligations on the facility								42,600,000
Principal payments								7,900,000
The Joint Venture Company [Member] | Subsequent Event [Member]
Schedule Of Liquidity [Line Items]
Principal payments		13,800,000
Outstanding Principal Balance		$ 38,300,000
Scenario Forecast [Member] | The Joint Venture Company [Member] | Amended Facility [Member]
Schedule Of Liquidity [Line Items]
Deferred principal repayments					$ 10,600,000
Maturity date, description					extend the maturity date of the Facility from December 31, 2026 to June 30, 2027
Capital Calls [Member] | The Joint Venture Company [Member]
Schedule Of Liquidity [Line Items]
Exploration Budget, Funded Amount						$ 31,300,000		$ 31,300,000

X

- Definition

Cash distribution relating to production

+ References

No definition available.

+ Details

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

X

- Definition

Cash distributions received.

+ References

No definition available.

+ Details

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

X

- Definition

Distributions from exploration.

+ References

No definition available.

+ Details

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

X

- Definition

Equity method investment entity shares of exploration budget funded amount for next fiscal year.

+ References

No definition available.

+ Details

Name:	ctgo_EquityMethodInvestmentEntitySharesOfExplorationBudgetFundedAmountForNextFiscalYear
Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

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

+ References

No definition available.

+ Details

Name:	ctgo_ExplorationBudgetFundedAmount
Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Exploration budget funded amount for next fiscal year.

+ References

No definition available.

+ Details

Name:	ctgo_ExplorationBudgetFundedAmountForNextFiscalYear
Namespace Prefix:	ctgo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Schedule of liquidity.

+ References

No definition available.

+ Details

Name:	ctgo_ScheduleOfLiquidityLineItems
Namespace Prefix:	ctgo_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-4

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DebtInstrumentMaturityDateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477734/942-470-50-3

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

+ Details

Name:	us-gaap_RepaymentsOfSecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=ctgo_AmendedFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=ctgo_CapitalCallsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: