$MUX
McEwen Mining Inc. Stock $mux

$mux Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000155837022002910 Filed on March 07, 2022

Income Statement

Concept	2021 Q4	2021 Q3	2021
Revenue	$34.97M	$37.13M	$136.5M
YoY Change	26.23%	35.53%	30.3%
Cost Of Revenue	$40.86M	$36.79M	$143.0M
YoY Change	-1.27%	30.91%	8.6%
Gross Profit	-$5.897M	$344.0K	-$6.480M
YoY Change	-56.92%	-149.07%	-75.95%
Gross Profit Margin	-16.86%	0.93%	-4.75%
Selling, General & Admin	$8.855M	$7.480M	$23.87M
YoY Change	93.34%	14.02%	14.23%
% of Gross Profit		2174.42%
Research & Development	$4.487M	$6.245M	$22.60M
YoY Change	9.44%	41.29%	42.16%
% of Gross Profit		1815.41%
Depreciation & Amortization	$10.15M	$5.396M	$25.55M
YoY Change	47.92%	17.3%	10.65%
% of Gross Profit		1568.6%
Operating Expenses	$14.16M	$15.13M	$50.27M
YoY Change	65.64%	26.59%	70.4%
Operating Profit	-$20.06M	-$17.43M	-$64.28M
YoY Change	-9.79%	73.04%	-58.03%
Interest Expense	-$4.446M	-$4.050M	-$13.19M
YoY Change	76.43%	94.71%	88.46%
% of Operating Profit
Other Income/Expense, Net	-$54.00K	-$808.0K	$81.00K
YoY Change	-114.21%	-657.24%	-114.97%
Pretax Income	-$24.47M	-$18.24M	-$64.20M
YoY Change	3.4%	83.71%	-58.24%
Income Tax	-$3.437M	-$841.0K	-$7.315M
% Of Pretax Income
Net Earnings	-$21.03M	-$17.40M	-$56.71M
YoY Change	-10.68%	77.96%	-62.77%
Net Earnings / Revenue	-60.14%	-46.87%	-41.53%
Basic Earnings Per Share	-$0.46	-$0.38	-$1.25
Diluted Earnings Per Share	-$454.1K	-$379.0K	-$1.247M
COMMON SHARES
Basic Shares Outstanding	459.2M	459.2M	454.9M
Diluted Shares Outstanding	45.49M	45.92M	454.9M

Balance Sheet

Concept	2021 Q4	2021 Q3	2021
SHORT-TERM ASSETS
Cash & Short-Term Investments	$56.09M	$64.94M	$56.09M
YoY Change	169.68%	711.77%	169.68%
Cash & Equivalents	$54.29M	$63.14M	$54.29M
Short-Term Investments	$1.806M	$1.798M	$1.806M
Other Short-Term Assets	$9.433M	$6.253M	$9.433M
YoY Change	141.87%	-38.7%	141.87%
Inventory	$15.79M	$19.25M	$15.79M
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$85.03M	$92.13M	$85.03M
YoY Change	58.94%	60.09%	58.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$342.3M	$342.7M	$342.3M
YoY Change	598.67%	3.78%	4.01%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$90.96M	$95.69M	$90.96M
YoY Change	-16.01%	-12.05%	-16.01%
Other Assets	$711.0K	$712.0K	$7.050M
YoY Change	14.49%	15.21%	-21.67%
Total Long-Term Assets	$440.3M	$447.6M	$440.3M
YoY Change	-1.37%	-0.22%	-1.36%
TOTAL ASSETS
Total Short-Term Assets	$85.03M	$92.13M	$85.03M
Total Long-Term Assets	$440.3M	$447.6M	$440.3M
Total Assets	$525.3M	$539.8M	$525.3M
YoY Change	5.08%	6.64%	5.09%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$39.62M	$29.29M	$39.62M
YoY Change	9.74%	1.33%	9.74%
Accrued Expenses	$2.901M	$3.002M	$2.901M
YoY Change	20.88%	36.45%	20.88%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$2.000M	$0.00
YoY Change
Long-Term Debt Due		$4.000M
YoY Change
Total Short-Term Liabilities	$52.40M	$46.31M	$52.40M
YoY Change	15.03%	28.71%	14.91%
LONG-TERM LIABILITIES
Long-Term Debt	$48.87M	$44.68M	$48.87M
YoY Change	1.47%	-6.92%	1.38%
Other Long-Term Liabilities	$2.929M	$2.938M	$34.14M
YoY Change	-10.07%	-12.69%	-7.99%
Total Long-Term Liabilities	$51.80M	$2.938M	$83.00M
YoY Change	0.74%	-12.69%	-2.7%
TOTAL LIABILITIES
Total Short-Term Liabilities	$52.40M	$46.31M	$52.40M
Total Long-Term Liabilities	$51.80M	$2.938M	$83.00M
Total Liabilities	$135.4M	$128.9M	$150.2M
YoY Change	0.59%	2.82%	11.57%
SHAREHOLDERS EQUITY
Retained Earnings	-$1.240B	-$1.219B
YoY Change	4.81%	5.12%
Common Stock	$1.616B	$1.615B
YoY Change	4.31%	4.84%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$375.2M	$396.0M	$375.2M
YoY Change
Total Liabilities & Shareholders Equity	$525.3M	$539.8M	$525.3M
YoY Change	5.08%	6.64%	5.09%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021
OPERATING ACTIVITIES
Net Income	-$21.03M	-$17.40M	-$56.71M
YoY Change	-10.68%	77.96%	-62.77%
Depreciation, Depletion And Amortization	$10.15M	$5.396M	$25.55M
YoY Change	47.92%	17.3%	10.65%
Cash From Operating Activities	-$1.147M	-$11.00M	-$20.22M
YoY Change	-55.88%	112.82%	-27.45%
INVESTING ACTIVITIES
Capital Expenditures	-$6.405M	-$8.111M	-$34.89M
YoY Change	57.37%	913.87%	160.94%
Acquisitions
YoY Change
Other Investing Activities	$2.271M	$0.00	$10.32M
YoY Change	3685.0%	-100.0%	541.24%
Cash From Investing Activities	-$4.134M	-$8.111M	-$24.56M
YoY Change	3.09%	-5169.37%	108.75%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$29.88M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.404M	42.58M	80.98M
YoY Change	-136.52%	359.78%	360.71%
NET CHANGE
Cash From Operating Activities	-1.147M	-11.00M	-20.22M
Cash From Investing Activities	-4.134M	-8.111M	-24.56M
Cash From Financing Activities	-3.404M	42.58M	80.98M
Net Change In Cash	-8.685M	23.46M	36.20M
YoY Change	-420.48%	452.05%	-264.06%
FREE CASH FLOW
Cash From Operating Activities	-$1.147M	-$11.00M	-$20.22M
Capital Expenditures	-$6.405M	-$8.111M	-$34.89M
Free Cash Flow	$5.258M	-$2.892M	$14.67M
YoY Change	257.69%	-33.82%	-201.12%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2021Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://www.mcewenmining.com/20211231#LeaseLiabilityCurrent http://www.mcewenmining.com/20211231#LeaseLiabilityNonCurrent
CY2021Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://www.mcewenmining.com/20211231#LeaseLiabilityCurrent http://www.mcewenmining.com/20211231#LeaseLiabilityNonCurrent
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000314203
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	459188000
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	416587000
CY2020Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://www.mcewenmining.com/20211231#LeaseLiabilityCurrent http://www.mcewenmining.com/20211231#LeaseLiabilityNonCurrent
CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://www.mcewenmining.com/20211231#LeaseLiabilityCurrent http://www.mcewenmining.com/20211231#LeaseLiabilityNonCurrent
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-33190
CY2021	dei	Entity Registrant Name EntityRegistrantName	MCEWEN MINING INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	CO
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	84-0796160
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	150 King Street West
CY2021	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 2800
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Toronto
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	ON
CY2021	dei	Entity Address Country EntityAddressCountry	CA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	M5H 1J9
CY2021	dei	City Area Code CityAreaCode	866
CY2021	dei	Local Phone Number LocalPhoneNumber	441-0690
CY2021	dei	Security12b Title Security12bTitle	Common Stock, no par value
CY2021	dei	Trading Symbol TradingSymbol	MUX
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	633678600
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	473687391
CY2021	dei	Auditor Firm AuditorFirmId	1263
CY2021	dei	Auditor Location AuditorLocation	Toronto, Canada
CY2021	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2021	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	23798000
CY2020	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	22910000
CY2019	us-gaap	Cost Depreciation Amortization And Depletion CostDepreciationAmortizationAndDepletion	24753000
CY2021	us-gaap	Gross Profit GrossProfit	-6480000
CY2020	us-gaap	Gross Profit GrossProfit	-26948000
CY2019	us-gaap	Gross Profit GrossProfit	8986000
CY2021	mux	Advanced Project Cost AdvancedProjectCost	12439000
CY2020	mux	Advanced Project Cost AdvancedProjectCost	11681000
CY2019	mux	Advanced Project Cost AdvancedProjectCost	9520000
CY2021	us-gaap	Exploration Costs ExplorationCosts	22604000
CY2020	us-gaap	Exploration Costs ExplorationCosts	15861000
CY2019	us-gaap	Exploration Costs ExplorationCosts	37744000
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	11435000
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	9201000
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	12785000
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-7533000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1517000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-8754000
CY2021	us-gaap	Depreciation Nonproduction DepreciationNonproduction	339000
CY2020	us-gaap	Depreciation Nonproduction DepreciationNonproduction	405000
CY2019	us-gaap	Depreciation Nonproduction DepreciationNonproduction	566000
CY2021	mux	Asset Retirement Obligation Reclamation Gross AssetRetirementObligationReclamationGross	3450000
CY2020	mux	Asset Retirement Obligation Reclamation Gross AssetRetirementObligationReclamationGross	1788000
CY2019	mux	Asset Retirement Obligation Reclamation Gross AssetRetirementObligationReclamationGross	3531000
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	83805000
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1968000
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	57800000
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	126226000
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	72900000
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-64280000
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-153174000
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-63914000
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-6200000
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-7434000
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-6817000
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6281000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6893000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7140000
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	81000
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-541000
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	323000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-64199000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-153715000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-63591000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7315000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1390000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3844000
CY2021	us-gaap	Profit Loss ProfitLoss	-56884000
CY2020	us-gaap	Profit Loss ProfitLoss	-152325000
CY2019	us-gaap	Profit Loss ProfitLoss	-59747000
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	172000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-56712000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-152325000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-59747000
CY2021	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.12
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.38
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.17
CY2021	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	454899000
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	403457000
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	361845000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	54287000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	20843000
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	2550000
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1806000
CY2021Q4	mux	Receivables Other Assets Net Current ReceivablesOtherAssetsNetCurrent	10591000
CY2020Q4	mux	Receivables Other Assets Net Current ReceivablesOtherAssetsNetCurrent	5690000
CY2021Q4	us-gaap	Inventory Net InventoryNet	15792000
CY2020Q4	us-gaap	Inventory Net InventoryNet	26964000
CY2021Q4	us-gaap	Assets Current AssetsCurrent	85026000
CY2020Q4	us-gaap	Assets Current AssetsCurrent	53497000
CY2021Q4	mux	Mineral Property Interests And Plant And Equipment Net MineralPropertyInterestsAndPlantAndEquipmentNet	342303000
CY2020Q4	mux	Mineral Property Interests And Plant And Equipment Net MineralPropertyInterestsAndPlantAndEquipmentNet	329112000
CY2021Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	90961000
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	108326000
CY2021Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	2543000
CY2020Q4	us-gaap	Inventory Noncurrent InventoryNoncurrent	4785000
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	3797000
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CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	711000
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	621000
CY2021Q4	us-gaap	Assets Assets	525341000
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CY2021Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	39615000
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	36055000
CY2021Q4	mux	Flow Through Share Premium Current FlowThroughSharePremiumCurrent	1572000
CY2020Q4	mux	Flow Through Share Premium Current FlowThroughSharePremiumCurrent	3827000
CY2021Q4	mux	Lease Liability Current LeaseLiabilityCurrent	2901000
CY2020Q4	mux	Lease Liability Current LeaseLiabilityCurrent	2440000
CY2021Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	5761000
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	3232000
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	2550000
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	52399000
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	45554000
CY2021Q4	mux	Lease Liability Non Current LeaseLiabilityNonCurrent	1515000
CY2020Q4	mux	Lease Liability Non Current LeaseLiabilityNonCurrent	3056000
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	48866000
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	48160000
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CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	3257000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3813000
CY2021Q4	us-gaap	Liabilities Liabilities	135400000
CY2020Q4	us-gaap	Liabilities Liabilities	134608000
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	459188000
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	416587000
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	1615596000
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	1548876000
CY2021Q4	us-gaap	Minority Interest MinorityInterest	14777000
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-1240432000
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CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	365328000
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	525341000
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	499936000
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CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	544000
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1851000
CY2019	us-gaap	Stock Issued During Period Value Purchase Of Assets StockIssuedDuringPeriodValuePurchaseOfAssets	724000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-59747000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	499479000
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CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	138000
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	-1875000
CY2020	us-gaap	Stock Issued During Period Value Purchase Of Assets StockIssuedDuringPeriodValuePurchaseOfAssets	70000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-152325000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	365328000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	365328000
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	837000
CY2021	mux	Stockholders Equity Payments Of Capital Distribution StockholdersEquityPaymentsOfCapitalDistribution	-29875000
CY2021	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	39828000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-56712000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	389941000
CY2021	us-gaap	Profit Loss ProfitLoss	-56884000
CY2020	us-gaap	Profit Loss ProfitLoss	-152325000
CY2019	us-gaap	Profit Loss ProfitLoss	-59747000
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	83805000
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-7533000
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1517000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-8754000
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2270000
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-96000
CY2021	mux	Mineral Property Interests And Asset Retirement Obligations Amortization MineralPropertyInterestsAndAssetRetirementObligationsAmortization	25549000
CY2020	mux	Mineral Property Interests And Asset Retirement Obligations Amortization MineralPropertyInterestsAndAssetRetirementObligationsAmortization	23090000
CY2019	mux	Mineral Property Interests And Asset Retirement Obligations Amortization MineralPropertyInterestsAndAssetRetirementObligationsAmortization	25543000
CY2021	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	28000
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-619000
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	5259000
CY2021	mux	Unrealized Foreign Exchange Gain Loss Asset Retirement Obligations UnrealizedForeignExchangeGainLossAssetRetirementObligations	-15000
CY2020	mux	Unrealized Foreign Exchange Gain Loss Asset Retirement Obligations UnrealizedForeignExchangeGainLossAssetRetirementObligations	-278000
CY2019	mux	Unrealized Foreign Exchange Gain Loss Asset Retirement Obligations UnrealizedForeignExchangeGainLossAssetRetirementObligations	-919000
CY2021	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-7315000
CY2020	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-1390000
CY2019	us-gaap	Income Tax Credits And Adjustments IncomeTaxCreditsAndAdjustments	-3844000
CY2021	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	837000
CY2020	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	612000
CY2019	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	694000
CY2021	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	3450000
CY2020	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	1788000
CY2019	us-gaap	Accretion Expense Including Asset Retirement Obligations AccretionExpenseIncludingAssetRetirementObligations	3531000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-7887000
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-12696000
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	17484000
CY2021	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	1003000
CY2020	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	1437000
CY2019	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	7270000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-20223000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-27873000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-39527000
CY2021	us-gaap	Payments To Acquire Mining Assets PaymentsToAcquireMiningAssets	34888000
CY2020	us-gaap	Payments To Acquire Mining Assets PaymentsToAcquireMiningAssets	13373000
CY2019	us-gaap	Payments To Acquire Mining Assets PaymentsToAcquireMiningAssets	29707000
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	492000
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1266000
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	6769000
CY2021	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	9832000
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	340000
CY2019	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	8877000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-24564000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-11767000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-14061000
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	29875000
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	69467000
CY2021	mux	Proceeds From Issuance Of Flow Through Common Stock ProceedsFromIssuanceOfFlowThroughCommonStock	11966000
CY2020	mux	Proceeds From Issuance Of Flow Through Common Stock ProceedsFromIssuanceOfFlowThroughCommonStock	19644000
CY2021	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	40000000
CY2021	mux	Subscription Proceeds Received In Advance SubscriptionProceedsReceivedInAdvance	2550000
CY2019	mux	Proceeds From Issuance Of At Market Common Stock ProceedsFromIssuanceOfAtMarketCommonStock	1851000
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	138000
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	544000
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3408000
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	2204000
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1855000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	80983000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	17578000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	70007000
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-408000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	36196000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-22062000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	16011000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	24438000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	46500000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	30489000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	60634000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	24438000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	46500000
CY2021	mux	Duration Of Current Portion Of Inventories To Be Processed Or Recovered DurationOfCurrentPortionOfInventoriesToBeProcessedOrRecovered	P12M
CY2021	mux	Ownership Percentage OwnershipPercentage	1
CY2021	us-gaap	Nature Of Operations NatureOfOperations	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 12pt 0pt;"><b style="font-weight:bold;">NOTE 1 NATURE OF OPERATIONS</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt 0pt 12pt 0pt;">McEwen Mining Inc. (the “Company”) was organized under the laws of the State of Colorado on July 24, 1979. The Company is engaged in the exploration, development, production and sale of gold and silver and exploration for copper.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;">The Company operates in the United States, Canada, Mexico and Argentina. The Company owns a 100% interest in the Gold Bar gold mine in Nevada, the Fox Complex in Ontario, Canada, the El Gallo gold project and the Fenix silver-gold project in Sinaloa, Mexico, and a portfolio of exploration properties in Nevada, Canada, Mexico, and Argentina. As of December 31, 2021, Minera Andes Inc., a wholly owned subsidiary of the Company, owns an 81.4% of McEwen Copper which holds a 100% interest in the Los Azules copper deposit in San Juan, Argentina, and the Elder Creek exploration property in Nevada. It also owns a 49% interest in Minera Santa Cruz S.A. (“MSC”), owner of the producing San José silver-gold mine in Santa Cruz, Argentina, which is operated by the joint venture majority owner Hochschild Mining plc.</p>
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><b style="font-weight:bold;">Basis of Presentation and Use of Estimates:</b> </p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt 0pt 12pt 0pt;">The Company’s consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of the Company’s consolidated financial statements requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relate to environmental reclamation and closure obligations; asset useful lives utilized for depletion, depreciation, amortization and accretion calculations; fair value of equity investment and the impairment test; recoverable gold in leach pad inventory; current and long-term inventory; mine development capitalization costs; the collectability of value added taxes receivable; reserves; valuation allowances for deferred tax assets; income and mining tax provisions; reserves for contingencies and litigation and costs related to COVID-19. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Actual results may differ significantly from these estimates. </p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 12pt 0pt;">References to “C$” refer to Canadian currency.</p>
CY2021	mux	Duration Of Drilling And Related Costs Capitalized DurationOfDrillingAndRelatedCostsCapitalized	P1Y
CY2021	mux	Option To Sell Prior To Completion Of Refining OptionToSellPriorToCompletionOfRefining	0.90
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-64199000
CY2021	mux	Payments To Acquire Property Plant And Equipment And Acquire Mining Assets PaymentsToAcquirePropertyPlantAndEquipmentAndAcquireMiningAssets	36033000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-153715000
CY2020	mux	Payments To Acquire Property Plant And Equipment And Acquire Mining Assets PaymentsToAcquirePropertyPlantAndEquipmentAndAcquireMiningAssets	13925000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-63591000
CY2019	mux	Payments To Acquire Property Plant And Equipment And Acquire Mining Assets PaymentsToAcquirePropertyPlantAndEquipmentAndAcquireMiningAssets	30270000
CY2021Q4	us-gaap	Noncurrent Assets NoncurrentAssets	440316000
CY2020Q4	us-gaap	Noncurrent Assets NoncurrentAssets	445624000
CY2021	us-gaap	Revenues Revenues	136541000
CY2020	us-gaap	Revenues Revenues	104789000
CY2019	us-gaap	Revenues Revenues	117019000
CY2021Q4	mux	Operating Lease Right Of Use Asset Office Lease Asset OperatingLeaseRightOfUseAssetOfficeLeaseAsset	400000
CY2020Q4	mux	Operating Lease Right Of Use Asset Office Lease Asset OperatingLeaseRightOfUseAssetOfficeLeaseAsset	600000
CY2021	mux	Unusual Or Infrequent Item Relief UnusualOrInfrequentItemRelief	3541000
CY2020	mux	Unusual Or Infrequent Item Relief UnusualOrInfrequentItemRelief	6420000
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	28000
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	-619000
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	5259000
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	513000
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1078000
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1806000
CY2021Q2	mux	Disposal Group Including Discontinued Operation Consideration Shares Received DisposalGroupIncludingDiscontinuedOperationConsiderationSharesReceived	4963455
CY2021Q2	mux	Disposal Group Including Discontinued Operation Consideration Warrants Received DisposalGroupIncludingDiscontinuedOperationConsiderationWarrantsReceived	2481727
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1697000
CY2021	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2199000
CY2020	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	14000
CY2019	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	184000
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6281000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6893000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7140000
CY2021	mux	Payments To Acquire Available For Sale And Trading Securities PaymentsToAcquireAvailableForSaleAndTradingSecurities	1777000
CY2021	mux	Available For Sale And Trading Securities Gross Unrealized Gain Loss AvailableForSaleAndTradingSecuritiesGrossUnrealizedGainLoss	28000
CY2021Q4	us-gaap	Value Added Tax Receivable Current ValueAddedTaxReceivableCurrent	3708000
CY2020Q4	us-gaap	Value Added Tax Receivable Current ValueAddedTaxReceivableCurrent	1810000
CY2021Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	6883000
CY2020Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	3880000
CY2021Q4	mux	Receivables Other Assets Net Current ReceivablesOtherAssetsNetCurrent	10591000
CY2020Q4	mux	Receivables Other Assets Net Current ReceivablesOtherAssetsNetCurrent	5690000
CY2020Q4	mux	Inventory Ore On Leach Pads Net Of Reserves InventoryOreOnLeachPadsNetOfReserves	21003000
CY2021Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	3049000
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	3922000
CY2021Q4	mux	Inventory Ore Stockpiles Net Of Reserves InventoryOreStockpilesNetOfReserves	5105000
CY2020Q4	mux	Inventory Ore Stockpiles Net Of Reserves InventoryOreStockpilesNetOfReserves	635000
CY2021Q4	mux	Inventory Ore On Leach Pads Net Of Reserves InventoryOreOnLeachPadsNetOfReserves	4660000
CY2021Q4	mux	Inventory Precious Metals Net Of Reserves InventoryPreciousMetalsNetOfReserves	1819000
CY2020Q4	mux	Inventory Precious Metals Net Of Reserves InventoryPreciousMetalsNetOfReserves	1344000
CY2021Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	3702000
CY2020Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	4845000
CY2021Q4	us-gaap	Inventory Gross InventoryGross	18335000
CY2020Q4	us-gaap	Inventory Gross InventoryGross	31749000
CY2021Q4	us-gaap	Inventory Adjustments InventoryAdjustments	2543000
CY2020Q4	us-gaap	Inventory Adjustments InventoryAdjustments	4785000
CY2021Q4	us-gaap	Inventory Net InventoryNet	15792000
CY2020Q4	us-gaap	Inventory Net InventoryNet	26964000
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	13900000
CY2021Q4	mux	Mineral Property Interests And Plant And Equipment Net MineralPropertyInterestsAndPlantAndEquipmentNet	342303000
CY2020Q4	mux	Mineral Property Interests And Plant And Equipment Net MineralPropertyInterestsAndPlantAndEquipmentNet	329112000
CY2021Q4	us-gaap	Mineral Properties Net MineralPropertiesNet	297332000
CY2020Q4	us-gaap	Mineral Properties Net MineralPropertiesNet	280118000
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	83800000
CY2021	mux	Subsidiary Percentage SubsidiaryPercentage	1
CY2021Q4	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.49
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	3833000
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4735000
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	583000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	761000
CY2021Q4	mux	Lease Liability LeaseLiability	4416000
CY2020Q4	mux	Lease Liability LeaseLiability	5496000
CY2021Q4	mux	Lease Liability Current LeaseLiabilityCurrent	2901000
CY2020Q4	mux	Lease Liability Current LeaseLiabilityCurrent	2440000
CY2021Q4	mux	Lease Liability Non Current LeaseLiabilityNonCurrent	1515000
CY2020Q4	mux	Lease Liability Non Current LeaseLiabilityNonCurrent	3056000
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0667
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0873
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P1Y
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2021	us-gaap	Lease Cost LeaseCost	2000000.0
CY2020	us-gaap	Lease Cost LeaseCost	1300000
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1659000
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	878000
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	329000
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	392000
CY2021	mux	Finance Lease Cost FinanceLeaseCost	1988000
CY2020	mux	Finance Lease Cost FinanceLeaseCost	1270000
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	135000
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	194000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	246000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	250000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	167000
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	663000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	2704000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	808000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	274000
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	3785000
CY2021Q4	mux	Lease Liability Payments Due Next Twelve Months LeaseLiabilityPaymentsDueNextTwelveMonths	2949000
CY2021Q4	mux	Lease Liability Payments Due Year Two LeaseLiabilityPaymentsDueYearTwo	1058000
CY2021Q4	mux	Lease Liability Payments Due Year Three LeaseLiabilityPaymentsDueYearThree	441000
CY2021Q4	mux	Lease Liability Payments Due LeaseLiabilityPaymentsDue	4448000
CY2021Q4	mux	Lease Liability Undiscounted Excess Amount LeaseLiabilityUndiscountedExcessAmount	32000
CY2021Q4	mux	Lease Liability LeaseLiability	4416000
CY2020Q4	mux	Debt And Debt To Related Party Noncurrent DebtAndDebtToRelatedPartyNoncurrent	48160000
CY2019Q4	mux	Debt And Debt To Related Party Noncurrent DebtAndDebtToRelatedPartyNoncurrent	49516000
CY2021	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	5581000
CY2020	us-gaap	Interest Expense Long Term Debt InterestExpenseLongTermDebt	5394000
CY2021	us-gaap	Debt Instrument Periodic Payment Interest DebtInstrumentPeriodicPaymentInterest	4875000
CY2020	us-gaap	Debt Instrument Periodic Payment Interest DebtInstrumentPeriodicPaymentInterest	4875000
CY2020	mux	Debt Amendment Equity DebtAmendmentEquity	1875000
CY2021Q4	mux	Debt And Debt To Related Party Noncurrent DebtAndDebtToRelatedPartyNoncurrent	48866000
CY2020Q4	mux	Debt And Debt To Related Party Noncurrent DebtAndDebtToRelatedPartyNoncurrent	48160000
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	34000000
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	32201000
CY2021	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	2225000
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	267000
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2405000
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	1901000
CY2021	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1257000
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-54000
CY2021	us-gaap	Asset Retirement Obligation Foreign Currency Translation Gain Loss AssetRetirementObligationForeignCurrencyTranslationGainLoss	15000
CY2021	us-gaap	Accretion Expense AccretionExpense	2405000
CY2020	us-gaap	Asset Retirement Obligation Foreign Currency Translation Gain Loss AssetRetirementObligationForeignCurrencyTranslationGainLoss	219000
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	35452000
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	34000000
CY2021Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	5761000
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	3232000
CY2021Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	29691000
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	30768000
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	700000
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	800000
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	100000
CY2020	us-gaap	Accretion Expense AccretionExpense	1901000
CY2019	us-gaap	Accretion Expense AccretionExpense	1680000
CY2021	mux	Reclamation And Remediation Expense ReclamationAndRemediationExpense	3450000
CY2020	mux	Reclamation And Remediation Expense ReclamationAndRemediationExpense	1788000
CY2019	mux	Reclamation And Remediation Expense ReclamationAndRemediationExpense	3531000
CY2021	mux	Reclamation Adjustments ReclamationAdjustments	1045000
CY2020	mux	Reclamation Adjustments ReclamationAdjustments	-113000
CY2019	mux	Reclamation Adjustments ReclamationAdjustments	1851000
CY2021Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000
CY2021Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	675000000
CY2019Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	1935484
CY2019Q2	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	2600000
CY2019Q2	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	400000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	6171167
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7012334
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	4243000
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.33
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1475000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	3050000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	1.73
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	535000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	1.01
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	419000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	700000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	2.56
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	789000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	2.90
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5269000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.00
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	364000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	5097000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	1.22
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	135000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	1.02
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	10000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	1968000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	2.18
CY2020	mux	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeited In Period Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodIntrinsicValue	2000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	1251000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	1.19
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7012000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	1.55
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y2M12D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	53000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	950000
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	1.22
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	10000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	1589000
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	1.46
CY2021	mux	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeited In Period Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodIntrinsicValue	2000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	202000
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	7.10
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	6171000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	1.34
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y2M12D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	53000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2265000
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	1.47
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y7M6D
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum	0.00519
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum	0.00873
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum	0.00157
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum	0.00322
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum	0.0145
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum	0.0187
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum	0.63
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum	0.59
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.59
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate Minimum ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum	0.58
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P3Y6M
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P3Y6M
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P3Y6M
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	1.22
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	1.22
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	1.73
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	840000
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	600000
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	400000
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	600000
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	1400000
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	1000000.0
CY2021	mux	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Number EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptionsNumber	3900000
CY2020	mux	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Number EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptionsNumber	6100000
CY2019	mux	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options Number EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptionsNumber	3000000.0
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y4M24D
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y7M6D
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y6M
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-56712000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-152325000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-59747000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	454899000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	403457000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	361845000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	454899000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	403457000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	361845000
CY2021	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.12
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.38
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.17
CY2021Q4	mux	Operating Leases Future Minimum Payments Due Mining And Surface Rights Due In Next Twelve Months OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInNextTwelveMonths	492000
CY2021Q4	mux	Operating Leases Future Minimum Payments Due Mining And Surface Rights Due In Two Years OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInTwoYears	488000
CY2021Q4	mux	Operating Leases Future Minimum Payments Due Mining And Surface Rights Due In Three Years OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInThreeYears	470000
CY2021Q4	mux	Operating Leases Future Minimum Payments Due Mining And Surface Rights Due In Four Years OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDueInFourYears	443000
CY2021Q4	mux	Operating Leases Future Minimum Payments Due Mining And Surface Rights Due OperatingLeasesFutureMinimumPaymentsDueMiningAndSurfaceRightsDue	1893000
CY2021Q4	mux	Exploration Costs Due In Next Twelve Months ExplorationCostsDueInNextTwelveMonths	8116000
CY2021Q4	mux	Exploration Costs Due In Second Year ExplorationCostsDueInSecondYear	15080000
CY2021Q4	mux	Exploration Cost ExplorationCost	23196000
CY2021Q4	mux	Reclamation Costs Due In Next Twelve Months ReclamationCostsDueInNextTwelveMonths	6358000
CY2021Q4	mux	Reclamation Costs Due In Second Year ReclamationCostsDueInSecondYear	5873000
CY2021Q4	mux	Reclamation Costs Due In Third Year ReclamationCostsDueInThirdYear	525000
CY2021Q4	mux	Reclamation Costs Due In Fourth Year ReclamationCostsDueInFourthYear	1186000
CY2021Q4	mux	Reclamation Costs Due Thereafter ReclamationCostsDueThereafter	29215000
CY2021Q4	mux	Reclamation Costs ReclamationCosts	43157000
CY2021Q4	mux	Long Term Debt Obligations In Next Twelve Months LongTermDebtObligationsInNextTwelveMonths	4875000
CY2021Q4	mux	Long Term Debt Obligations In Second Year LongTermDebtObligationsInSecondYear	14712000
CY2021Q4	mux	Long Term Debt Obligations In Third Year LongTermDebtObligationsInThirdYear	32710000
CY2021Q4	mux	Long Term Debt Obligations In Fourth Year LongTermDebtObligationsInFourthYear	10027000
CY2021Q4	mux	Long Term Debt Obligations LongTermDebtObligations	62324000
CY2021Q4	mux	Lease Liability Payments Due Next Twelve Months LeaseLiabilityPaymentsDueNextTwelveMonths	2949000
CY2021Q4	mux	Lease Liability Payments Due Year Two LeaseLiabilityPaymentsDueYearTwo	1058000
CY2021Q4	mux	Lease Liability Payments Due Year Three LeaseLiabilityPaymentsDueYearThree	441000
CY2021Q4	mux	Lease Liability Payments Due LeaseLiabilityPaymentsDue	4448000
CY2021Q4	us-gaap	Contractual Obligation Due In Next Twelve Months ContractualObligationDueInNextTwelveMonths	22791000
CY2021Q4	us-gaap	Contractual Obligation Due In Second Year ContractualObligationDueInSecondYear	37210000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1390000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3844000
CY2021Q4	us-gaap	Contractual Obligation Due In Third Year ContractualObligationDueInThirdYear	34146000
CY2021Q4	us-gaap	Contractual Obligation Due In Fourth Year ContractualObligationDueInFourthYear	11656000
CY2021Q4	us-gaap	Contractual Obligation Due After Fifth Year ContractualObligationDueAfterFifthYear	29215000
CY2021Q4	us-gaap	Contractual Obligation ContractualObligation	135018000
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	54287000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	20843000
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	2550000
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	3797000
CY2020Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	3595000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	60634000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	24438000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-387000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-817000
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2420000
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-6928000
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-573000
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1424000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7315000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1390000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3844000
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2941000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7315000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-24808000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-127524000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-22319000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-39391000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-26191000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-41272000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-64199000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-153715000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-63591000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-64199000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-153715000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-63591000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-13482000
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-32280000
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-13354000
CY2021	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-1326000
CY2020	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-374000
CY2019	us-gaap	Income Tax Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary IncomeTaxReconciliationEquityInEarningsLossesOfUnconsolidatedSubsidiary	-2626000
CY2020	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	795000
CY2019	us-gaap	Income Tax Reconciliation Repatriation Of Foreign Earnings IncomeTaxReconciliationRepatriationOfForeignEarnings	598000
CY2021	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	6148000
CY2020	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	496000
CY2019	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	3150000
CY2021	mux	Income Tax Reconciliation Realized Flow Through Premium IncomeTaxReconciliationRealizedFlowThroughPremium	-3486000
CY2020	mux	Income Tax Reconciliation Realized Flow Through Premium IncomeTaxReconciliationRealizedFlowThroughPremium	-338000
CY2019	mux	Income Tax Reconciliation Realized Flow Through Premium IncomeTaxReconciliationRealizedFlowThroughPremium	-2954000
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-3039000
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-2043000
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-200000
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	9353000
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2546000
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	8421000
CY2021	mux	Income Tax Reconciliation Net Operating Loss Expired IncomeTaxReconciliationNetOperatingLossExpired	241000
CY2020	mux	Income Tax Reconciliation Net Operating Loss Expired IncomeTaxReconciliationNetOperatingLossExpired	1066000
CY2019	mux	Income Tax Reconciliation Net Operating Loss Expired IncomeTaxReconciliationNetOperatingLossExpired	810000
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-4377000
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	33086000
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	70830000
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	66085000
CY2021Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	59426000
CY2020Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	66038000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	29009000
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	30999000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	159265000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	163122000
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	149921000
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	154298000
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	9344000
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	8824000
CY2021Q4	mux	Deferred Tax Liabilities Acquisition Of Mineral Properties DeferredTaxLiabilitiesAcquisitionOfMineralProperties	9344000
CY2020Q4	mux	Deferred Tax Liabilities Acquisition Of Mineral Properties DeferredTaxLiabilitiesAcquisitionOfMineralProperties	12637000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9344000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	12637000
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3813000
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	154298000
CY2021	mux	Valuation Allowance Deferred Tax Asset Increase Amount ValuationAllowanceDeferredTaxAssetIncreaseAmount	4058000
CY2021	mux	Valuation Allowance Deferred Tax Asset Decrease Amount ValuationAllowanceDeferredTaxAssetDecreaseAmount	8435000
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	149921000
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	121212000
CY2020	mux	Valuation Allowance Deferred Tax Asset Increase Amount ValuationAllowanceDeferredTaxAssetIncreaseAmount	39794000
CY2020	mux	Valuation Allowance Deferred Tax Asset Decrease Amount ValuationAllowanceDeferredTaxAssetDecreaseAmount	6708000
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	154298000
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	124153000
CY2019	mux	Valuation Allowance Deferred Tax Asset Increase Amount ValuationAllowanceDeferredTaxAssetIncreaseAmount	2104000
CY2019	mux	Valuation Allowance Deferred Tax Asset Decrease Amount ValuationAllowanceDeferredTaxAssetDecreaseAmount	5045000
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	121212000
CY2020Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.02
CY2020Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.06
CY2020Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	400370000
CY2020Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	400513000
CY2020Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	403887000
CY2020Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	408959000
CY2021Q1	us-gaap	Gross Profit GrossProfit	-4986000
CY2021Q2	us-gaap	Gross Profit GrossProfit	4059000
CY2021Q3	us-gaap	Gross Profit GrossProfit	344000
CY2021Q4	us-gaap	Gross Profit GrossProfit	-5897000
CY2021Q1	us-gaap	Profit Loss ProfitLoss	-12466000
CY2021Q2	us-gaap	Profit Loss ProfitLoss	-5989000
CY2021Q3	us-gaap	Profit Loss ProfitLoss	-17401000
CY2021Q4	us-gaap	Profit Loss ProfitLoss	-21028000
CY2021Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.03
CY2021Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.01
CY2021Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.04
CY2021Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.05
CY2021Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	441794000
CY2021Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	459187000
CY2021Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	459187000
CY2021Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	454899000
CY2020Q1	us-gaap	Gross Profit GrossProfit	-3685000
CY2020Q2	us-gaap	Gross Profit GrossProfit	-8875000
CY2020Q3	us-gaap	Gross Profit GrossProfit	-701000
CY2020Q4	us-gaap	Gross Profit GrossProfit	-13687000
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-99191000
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-19814000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-9778000
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	-23542000
CY2020Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.25
CY2020Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.05
CY2021	us-gaap	Reclassifications Reclassifications	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 12pt 0pt;"><b style="font-weight:bold;">NOTE 22 COMPARATIVE FIGURES</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;">Certain amounts in prior years have been reclassified to conform to the current year’s presentation. Reclassified amounts were not material to the financial statements and relate to the presentation of Other Operating Expenses. <i style="font-style:italic;">Advanced projects </i>in the <i style="font-style:italic;">Statement of Operations </i>includes mine development costs, property holding and general and administrative costs associated with advanced stage projects. <i style="font-style:italic;">Exploration </i>in the <i style="font-style:italic;">Statement of Operations </i>includes exploration expenses, property holding and general and administrative costs associated with exploration stage projects. <i style="font-style:italic;">General and</i> <i style="font-style:italic;">Administrative </i>in the <i style="font-style:italic;">Statement of Operations </i>include corporate (head office) general and administrative costs.</p>

Files In Submission

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$MUX
McEwen Mining Inc. Stock $mux

2021 Q4 Form 10-K Financial Statement

#000155837022002910 Filed on March 07, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MUX McEwen Mining Inc. Stock $mux

2021 Q4 Form 10-K Financial Statement

#000155837022002910 Filed on March 07, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MUX
McEwen Mining Inc. Stock $mux