XML 153 R43.htm IDEA: XBRL DOCUMENT
v3.24.1

Joint Ventures (Details Narrative) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 29, 2016 USD ($) | Dec. 31, 2023 USD ($) $ / mmtu | Dec. 31, 2022 USD ($) | Jan. 31, 2011
New Jersey Mill |  |  |  |
Ownership rate |  |  |  | 35.00%
Equity Method Investment, Additional Information |  | The Company is the operator of the JV and charges operating costs to Crescent for milling its ore up to 7,000 tonnes/month, retain a milling capacity of 3,000 tonnes/month, and as the operator of the JV, receive a fee of $2.50/tonne milled |  |
Funding to expand the processing plant |  | $ 3,200,000 |  |
Joint venture |  | $ 2,080 | $ 1,926 |
Fees per tonne | $ / mmtu |  | 2.50 |  |
Butte Highlands JV, LLC |  |  |  |
Ownership rate | 50.00% |  |  |
Equity Method Investment, Additional Information |  | the Company purchased a 50% interest in Butte Highlands JV, LLC (“BHJV”) |  |
Total consideration | $ 435,000 |  |  |
Development costs | $ 2,000,000 |  |  |

X
- References No definition available. + Details
Name: | njmc_FessPerTonn
Namespace Prefix: | njmc_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | njmc_FundingProvidedToExpand
Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | njmc_JointVentureReceivable
Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | njmc_OwnershipPercentageByParent
Namespace Prefix: | njmc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 30 -Paragraph 8 -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479637/805-30-30-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479581/805-30-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 30 -Paragraph 7 -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479637/805-30-30-7 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The capitalized costs incurred during the period (excluded from amortization) to obtain access to proved reserves and to provide facilities for extracting, treating, gathering and storing the oil and gas. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(7)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479664/932-10-S99-1 + Details
Name: | us-gaap_DevelopmentCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This serves as a place to record data that is not required by accounting literature but is useful for readers of the financial statements as it relates to the details of an equity method investment in common stock. Such information may include the amount of change for a change in ownership (equity) percentage in a given period and the amount and type of the consideration given or received in relation to the change in ownership. + References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentAdditionalInformation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=njmc_NewJerseyMillMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=njmc_ButteHighlandsJvLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |