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Related Party Transactions (Details Narrative)	3 Months Ended
	Mar. 31, 2023 USD ($)
Related Party Transactions
Quarterly rent paid	$ 1,700
Monthely rent paid	$ 1,500

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- References

No definition available.

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

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- References

No definition available.

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Name:	njmc_QuarterlyRentPaid
Namespace Prefix:	njmc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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No definition available.

+ Details

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