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6. Notes Payable: Schedule of Maturities of Long-term Debt (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Details |  |
Note payable maturity 2015 | $ 180,385 njmc_NotesPayableMaturity2015 |
Note payable maturity 2016 | 44,704 njmc_NotesPayableMaturity2016 |
Note payable maturity 2017 | 2,207 njmc_NotesPayableMaturity2017 |
Note payable maturity 2018 | 2,462 njmc_NotesPayableMaturity2018 |
Note payable maturity 2019 | 2,747 njmc_NotesPayableMaturity2019 |
Note payable maturity after five years | 96,168 njmc_NotesPayableMaturityAfterFiveYears |
Notes Payable | $ 328,673 us-gaap_NotesPayable | $ 249,543 us-gaap_NotesPayable

X
- Definition Amount of notes payable that will mature in 2015 + References No definition available. + Details
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Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of notes payable that will mature in 2015 + References No definition available. + Details
Name: | njmc_NotesPayableMaturity2016
Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of notes payable that will mature in 2017 + References No definition available. + Details
Name: | njmc_NotesPayableMaturity2017
Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of notes payable that will mature in 2018 + References No definition available. + Details
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Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of notes payable that will mature in 2019 + References No definition available. + Details
Name: | njmc_NotesPayableMaturity2019
Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of notes payable that will mature subsequent to 5 years in the future. + References No definition available. + Details
Name: | njmc_NotesPayableMaturityAfterFiveYears
Namespace Prefix: | njmc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 + Details
Name: | us-gaap_NotesPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Balance Type: | na
Period Type: | duration