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11. Equity (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Details |  |
Common Stock, Shares Authorized | 200,000,000 us-gaap_CommonStockSharesAuthorized | 200,000,000 us-gaap_CommonStockSharesAuthorized
Preferred Stock, Shares Authorized | 1,000,000 us-gaap_PreferredStockSharesAuthorized | 1,000,000 us-gaap_PreferredStockSharesAuthorized
Stock options issued to management | 2,250,000 njmc_ShareBasedCompensationStockOptionsIssuedToManagement1 |
Stock options issued to management Value | $ 173,844 njmc_ShareBasedCompensationStockOptionsIssuedToManagement1Value |
Stock options issued to management | 500,000 njmc_ShareBasedCompensationStockOptionsIssuedToOfficer |
Stock options issued to officer value | 36,250 njmc_ShareBasedCompensationStockOptionsIssuedToOfficerValue |
Stock options issued to management | 1,750,000 njmc_ShareBasedCompensationStockOptionsIssuedToManagement2 |
Stock options issued to management Value | 116,153 njmc_ShareBasedCompensationStockOptionsIssuedToManagement2Value |
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures |  | 150,000 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Other General and Administrative Expense |  | 7,250 us-gaap_OtherGeneralAndAdministrativeExpense
Units Issued in connection with private placement for cash | 3,000,000 njmc_UnitIssuedInConnectionWithPrivatePlacementForCash | 22,000,000 njmc_UnitIssuedInConnectionWithPrivatePlacementForCash
Units Issued in connection with private placement Net Proceeds | 405,000 njmc_UnitIssuedInConnectionWithPrivatePlacementNetProceeds | 990,000 njmc_UnitIssuedInConnectionWithPrivatePlacementNetProceeds
Units Issued in connection with private placement 2 |  | 200,000 njmc_UnitIssuedInConnectionWithPrivatePlacement2
Units Issued in connection with private placement value 2 |  | 10,000 njmc_UnitIssuedInConnectionWithPrivatePlacementValue2
Units Issued in connection with private placement Description |  | units consisting of 6,000,000 shares and 3,000,000 warrants
Units Issued in connection with private placement for cash 2 per unit value | $ 0.20 njmc_UnitIssuedInConnectionWithPrivatePlacementForCash2PerUnitValue |
Units Issued in connection with private placement for cash 2 | 6,000,000 njmc_UnitIssuedInConnectionWithPrivatePlacementForCash2 |
Units Issued in connection with private placement Net Proceeds 2 | 1,080,000 njmc_UnitIssuedInConnectionWithPrivatePlacementNetProceeds2 |
Agent Warrants Issued in connection with private placement Net Proceeds | 1,200,000 njmc_AgentWarrantsIssuedInConnectionWithPrivatePlacement |
Agent Warrants Issued in connection with private placement per warrant value | $ 0.10 njmc_AgentWarrantsIssuedInConnectionWithPrivatePlacementPerWarrantValue |
Issuance of common stock and warrants for mineral property agreement, stock |  | 5,180,000 njmc_CommonStockIssuedForMineralPropertiesAgreementStock
Common stock issued for mineral properties |  | 259,000 njmc_CommonStockIssuedForMineralPropertiesAgreement
Issuance of common stock and warrants for exploration, stock |  | 714,286 us-gaap_StockIssuedDuringPeriodSharesOther
Non-controlling interest in GF&H Company | $ 50,000 us-gaap_NoncashOrPartNoncashAcquisitionInvestmentsAcquired1 |

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