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Mineral Properties (Details 1) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Mineral Properties
Interest Expense	$ 19,377	$ 22,961

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- References

No definition available.

+ Details

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Namespace Prefix:	njmc_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Amount of interest expense classified as other.

+ References

No definition available.

+ Details

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