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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2015
Jun. 30, 2015
Document and Entity Information:    
Entity Registrant Name New Jersey Mining Company  
Document Type 10-K  
Document Period End Date Dec. 31, 2015  
Trading Symbol njmc  
Amendment Flag false  
Entity Central Index Key 0001030192  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding 94,760,148  
Entity Filer Category Smaller Reporting Company  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer No  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus FY  
Entity Public Float   $ 6,623,118
Entity Incorporation, State Country Name Idaho  
Entity Incorporation, Date of Incorporation Jul. 18, 1996