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New Jersey Mining Company Consolidated Statement of Changes in Stockholders' Equity (USD $) | Common Stock Shares | Common Stock Amount USD ($) | Accumulated Deficit USD ($) | Comprehensive Income (loss) USD ($) | Non-controlling Interests USD ($) | Total USD ($)
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Stockholders' equity at Dec. 31, 2012 |  | $ 10,439,219 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember | $ (8,509,851)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 16,392 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ComprehensiveIncomeMember | $ 3,151,415 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 5,097,175 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Shares issued at Dec. 31, 2012 | 45,515,862 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Contribution from non-controlling interest in Mill JV |  |  |  |  | 32,009 us-gaap_ContributionsFromNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 32,009 us-gaap_ContributionsFromNoncontrollingInterests
Issuance of common stock and warrants for cash, net of offering costs |  | 1,000,000 us-gaap_StockIssuedDuringPeriodValueIssuedForCash / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember |  |  |  | 1,000,000 us-gaap_StockIssuedDuringPeriodValueIssuedForCash
Issuance of common stock and warrants for cash, net of offering costs, stock | 22,200,000 us-gaap_StockIssuedDuringPeriodSharesIssuedForCash / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Issuance of common stock and warrants for management and directors fees |  | 7,250 njmc_StockIssuedDuringPeriodValueDirectors / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember |  |  |  | 7,250 njmc_StockIssuedDuringPeriodValueDirectors
Issuance of common stock and warrants for management and directors fees, stock | 150,000 njmc_StockIssuedDuringPeriodStockDirectors / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Issuance of common stock and warrants for exploration |  | 50,000 us-gaap_StockIssuedDuringPeriodValueOther / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember |  |  |  | 50,000 us-gaap_StockIssuedDuringPeriodValueOther
Issuance of common stock and warrants for exploration, stock | 714,286 us-gaap_StockIssuedDuringPeriodSharesOther / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  | 714,286 us-gaap_StockIssuedDuringPeriodSharesOther
Issuance of common stock and warrants for mineral property agreement |  | 259,000 njmc_CommonStockIssuedForMineralPropertiesAgreement / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember |  |  |  | 259,000 njmc_CommonStockIssuedForMineralPropertiesAgreement
Issuance of common stock and warrants for mineral property agreement, stock | 5,180,000 njmc_CommonStockIssuedForMineralPropertiesAgreementStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  | 5,180,000 njmc_CommonStockIssuedForMineralPropertiesAgreementStock
Unrealized gain (loss) in marketable equity security |  |  |  | (10,589)us-gaap_UnrealizedGainLossOnInvestments / us-gaap_StatementEquityComponentsAxis = us-gaap_ComprehensiveIncomeMember |  | (10,589)us-gaap_UnrealizedGainLossOnInvestments
Net loss attributable to non-controlling interest |  |  |  |  | (6,804)us-gaap_IncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (6,804)us-gaap_IncomeLossAttributableToNoncontrollingInterest
Net loss attributable to the Company |  |  | (792,173)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | (792,173)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Stockholders' equity at Dec. 31, 2013 |  | 11,755,469 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember | (9,302,024)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 5,803 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ComprehensiveIncomeMember | 3,176,620 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 5,635,868 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Shares issued at Dec. 31, 2013 | 73,760,148 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Allocation of fair value of non-controlling interest in GF&H |  |  |  |  | 50,000 us-gaap_NoncashOrPartNoncashAcquisitionInvestmentsAcquired1 / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 50,000 us-gaap_NoncashOrPartNoncashAcquisitionInvestmentsAcquired1
Stock options granted to directors |  | 201,926 njmc_StockOptionsGrantedToDirectors / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember |  |  |  | 201,926 njmc_StockOptionsGrantedToDirectors
Other comprehensive loss |  |  |  | (5,803)us-gaap_OtherComprehensiveIncomeLossNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ComprehensiveIncomeMember |  | (5,803)us-gaap_OtherComprehensiveIncomeLossNetOfTax
Contribution from non-controlling interest in Mill JV |  |  |  |  | 22,988 us-gaap_ContributionsFromNoncontrollingInterests / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 22,988 us-gaap_ContributionsFromNoncontrollingInterests
Issuance of common stock and warrants for cash, net of offering costs |  | 1,485,000 us-gaap_StockIssuedDuringPeriodValueIssuedForCash / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember |  |  |  | 1,485,000 us-gaap_StockIssuedDuringPeriodValueIssuedForCash
Issuance of common stock and warrants for cash, net of offering costs, stock | 18,000,000 us-gaap_StockIssuedDuringPeriodSharesIssuedForCash / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |
Unrealized gain (loss) in marketable equity security |  |  |  |  |  | 18,938 us-gaap_UnrealizedGainLossOnInvestments
Net loss attributable to non-controlling interest |  |  |  |  | (2,495)us-gaap_IncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | (2,495)us-gaap_IncomeLossAttributableToNoncontrollingInterest
Net loss attributable to the Company |  |  | (1,433,634)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | (1,433,634)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Stockholders' equity at Dec. 31, 2014 |  | $ 13,442,395 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = njmc_CommonStockAmountMember | $ (10,735,658)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | $ 3,247,113 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ 5,953,850 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Shares issued at Dec. 31, 2014 | 91,760,148 us-gaap_SharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |  |

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