XML 75 R53.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Products, Properties and Production of Minerals (Details) - home | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Option to sell prior to the completion of refining (as a percent) |  | 90.00%
Number of townhomes purchased | 50 |
Minimum |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Period over which concentrates are provisionally priced at the end of a period after delivery to the customer |  | 30 days
Maximum |  |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |
Period over which concentrates are provisionally priced at the end of a period after delivery to the customer |  | 90 days

X
- References No definition available. + Details
Name: | mux_NatureOfOperationsAndSignificantAccountingPoliciesLineItems
Namespace Prefix: | mux_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of townhomes which will be rented to employees and contractors of Gold Bar Enterprises LLC, a subsidiary of the Company. + References No definition available. + Details
Name: | mux_NumberOfTownhomesPurchased
Namespace Prefix: | mux_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the option held by the entity to sell the product prior to completion of refining. + References No definition available. + Details
Name: | mux_OptionToSellPriorToCompletionOfRefining
Namespace Prefix: | mux_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period over which concentrates are provisionally priced, whereby the selling price is subject to final adjustments at the end of a period after delivery to the customer. + References No definition available. + Details
Name: | mux_PeriodOfConcentratesPurchasePriceSubjectToAdjustments
Namespace Prefix: | mux_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |