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STOCK BASED COMPENSATION (Details 2) In Millions, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2014 Nevada Pacific Gold Ltd. CAD | Dec. 31, 2014 Minera Andes CAD | Dec. 31, 2014 McEwen Mining Inc. USD ($) | Dec. 31, 2014 $0.75 - $2.25 McEwen Mining Inc. USD ($) | Dec. 31, 2014 $2.26 - $2.75 McEwen Mining Inc. USD ($) | Dec. 31, 2014 $2.76 - $3.25 McEwen Mining Inc. USD ($) | Dec. 31, 2014 $3.26 - $6.50 McEwen Mining Inc. USD ($) | Dec. 31, 2014 $6.51 - $8.31 McEwen Mining Inc. USD ($) | Dec. 31, 2014 C$2.00 - C$2.50 Minera Andes CAD | Dec. 31, 2014 C$2.51-C$3.00 Minera Andes CAD | Dec. 31, 2014 C$4.25 - C$4.50 Nevada Pacific Gold Ltd. CAD | Dec. 31, 2014 C$4.25 - C$4.50 Minera Andes CAD | Dec. 31, 2014 C$4.51 - C$4.75 Nevada Pacific Gold Ltd. CAD | Dec. 31, 2014 C$4.51 - C$4.75 Minera Andes CAD | Dec. 31, 2014 C$4.76 - C$5.00 Nevada Pacific Gold Ltd. CAD | Dec. 31, 2014 C$5.01 - C$6.70 Nevada Pacific Gold Ltd. CAD
Stock options outstanding and exercisable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Range of Exercise Price, low end of range (in dollars per share) |  |  |  |  |  | $ 0.75 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember | $ 2.26 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember | $ 2.76 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeThreeMember | $ 3.26 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember | $ 6.51 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember | 2.00 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember | 2.51 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember | 4.25 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember |  | 4.51 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember |  | 4.76 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember | 5.01 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Range of Exercise Price, high end of range (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | 4.50 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember | 2.50 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember | 4.75 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember | 3.00 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember | 5.00 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember | 6.70 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Options Outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number Outstanding (in shares) |  |  | 199,143 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember | 301,650 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember | 4,649,634 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember | 1,515,334 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember | 381,800 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember | 1,706,500 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeThreeMember | 516,500 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember | 529,500 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember | 256,650 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember | 45,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember | 40,500 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember |  | 110,343 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember |  | 2,300 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember | 46,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Exercise Price (in dollars per share) |  |  | 5.11 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember | 2.30 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember | $ 3.35 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember | $ 2.18 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember | $ 2.50 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember | $ 2.90 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeThreeMember | $ 5.01 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember | $ 7.16 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember | 2.27 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember | 2.51 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember | 4.30 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember |  | 4.74 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember |  | 4.91 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember | 6.70 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Remaining Contractual Life |  |  | 1 year 7 months 6 days | 4 months 24 days | 4 years 4 months 24 days | 3 years 2 months 12 days | 4 years 10 months 24 days | 4 years 7 months 6 days | 5 years 3 months 18 days | 6 years | 4 months 24 days | 4 months 24 days | 1 year 2 months 12 days |  | 1 year 10 months 24 days |  | 2 years 1 month 6 days | 1 year 4 months 24 days
Options Exercisable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number Exercisable (in shares) |  |  | 199,143 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember | 301,650 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember | 1,954,465 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember | 676,665 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember | 331,800 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember |  | 416,500 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember | 529,500 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember | 256,650 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember | 45,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember | 40,500 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember |  | 110,343 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember |  | 2,300 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember | 46,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Exercise Price (in dollars per share) |  |  | 5.11 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember | 2.30 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember | $ 4.12 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember | $ 2.09 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeOneMember | $ 2.51 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTwoMember |  | $ 4.82 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFourMember | $ 7.16 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = mux_McEwenMiningIncStockOptionPlanMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeFiveMember | 2.27 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSixMember | 2.51 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_MineraAndesIncMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeSevenMember | 4.30 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeEightMember |  | 4.74 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeNineMember |  | 4.91 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeTenMember | 6.70 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_BusinessAcquisitionAxis = mux_NevadaPacificGoldLtdMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = mux_ExercisePriceRangeElevenMember
Weighted Average Remaining Contractual Life |  |  | 1 year 7 months 6 days | 4 months 24 days | 4 years 6 months | 2 years 10 months 24 days | 5 years |  | 4 years 10 months 24 days | 6 years | 4 months 24 days | 4 months 24 days | 1 year 2 months 12 days |  | 1 year 10 months 24 days |  | 2 years 1 month 6 days | 1 year 4 months 24 days
Additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares required to be issued under the agreement | 712,830 mux_NumberOfSharesAgreedToBeIssuedUnderAgreement | 90,300 mux_NumberOfSharesAgreedToBeIssuedUnderAgreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares remaining under agreement | 319,640 mux_NumberOfSharesRemainingUnderAgreement | 90,300 mux_NumberOfSharesRemainingUnderAgreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued to settle part of account payables (in shares) | 393,190 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of remaining common shares outstanding payable | $ 0.4 mux_FairValueOfRemainingCommonSharesOutstandingPayable | $ 0.2 mux_FairValueOfRemainingCommonSharesOutstandingPayable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. + References No definition available. + Details
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