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Note 5 - Prepaid Expenses and Other	12 Months Ended
	Dec. 31, 2024
Prepaid Expenses and Other [Abstract]
Prepaid Expenses and Other	5. Prepaid Expenses and Other The Company had prepaid expenses and other assets of $1,114,522 and $1,112,910 as of December 31, 2024 and December 31, 2023, respectively. Current period and prior period prepaid and other assets primarily relate to prepaid claim rentals, surety bonds, and prepaid insurance.

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- Definition

Prepaid expenses and other.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The complete disclosure for prepaid expenses.

+ References

No definition available.

+ Details

Name:	ctgo_PrepaidExpensesTextBlock
Namespace Prefix:	ctgo_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration