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7. Property, Plant, and Equipment: Property, Plant and Equipment (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Details    
Mill land $ 225,289njmc_MillLand $ 225,289njmc_MillLand
Mill building 536,193njmc_MillBuilding 536,193njmc_MillBuilding
Milling equipment 4,005,623njmc_MillingEquipment 4,001,771njmc_MillingEquipment
Mill Buildings and Improvements, Gross 4,767,105njmc_MillBuildingsAndImprovementsGross 4,763,253njmc_MillBuildingsAndImprovementsGross
Mill buildings and improvements, accumulated depreciation (196,240)njmc_MillBuildingsAndImprovementsAccumulatedDepreciation (152,151)njmc_MillBuildingsAndImprovementsAccumulatedDepreciation
Mill Buildings and Improvements, Net 4,570,865njmc_MillBuildingsAndImprovementsNet 4,611,102njmc_MillBuildingsAndImprovementsNet
Buildings and Improvements, Gross 252,348us-gaap_BuildingsAndImprovementsGross 252,348us-gaap_BuildingsAndImprovementsGross
Buildings and improvements, accumulated depreciation (221,756)njmc_BuildingsAndImprovementsAccumulatedDepreciation (216,926)njmc_BuildingsAndImprovementsAccumulatedDepreciation
Buildings and improvements net 30,592njmc_BuildingsAndImprovementsNet 35,422njmc_BuildingsAndImprovementsNet
Land 1,007,675us-gaap_Land 1,007,675us-gaap_Land
Property, plant and equipment, net of accumulated depreciation $ 5,609,132us-gaap_PropertyPlantAndEquipmentNet $ 5,654,199us-gaap_PropertyPlantAndEquipmentNet