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Sales of Products (Details Narrative) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Sales of Products
Gold sales receivable	$ 1,127,604	$ 909,997

X

- References

No definition available.

+ Details

Name:	njmc_SalesOfProductsAbstract
Namespace Prefix:	njmc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of allowance for credit loss for right to consideration in exchange for good or service transferred to customer when right to consideration is unconditional.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479837/606-10-45-4

+ Details

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