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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	$ 180,385njmc_NotesPayableMaturity2015
Note payable maturity 2016	44,704njmc_NotesPayableMaturity2016
Note payable maturity 2017	2,207njmc_NotesPayableMaturity2017
Note payable maturity 2018	2,462njmc_NotesPayableMaturity2018
Note payable maturity 2019	2,747njmc_NotesPayableMaturity2019
Note payable maturity after five years	96,168njmc_NotesPayableMaturityAfterFiveYears
Notes Payable	$ 328,673us-gaap_NotesPayable	$ 249,543us-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

X

- 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

Name:	njmc_NotesPayableMaturity2018
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

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

X

- Details

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