Alio Gold Inc. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 100000 - Document - Document and Entity Information Network

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2 Implied Table Table

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3 Document And Entity Information [Abstract] Abstract alo:DocumentAndEntityInformationAbstract
4 Document Type Concept (Submission Type) For Period dei:DocumentType
5 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
6 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
7 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
8 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
9 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
10 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
11 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
12 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
13 Entity Well Known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
14 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
15 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
16 Entity Common Stock Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
17 100010 - Statement - Consolidated Statements of Earnings and Comprehensive Income Network

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18 Implied Table Table

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19 Income Statement [Abstract] Abstract ifrs-full:IncomeStatementAbstract
20 Metal revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
21 Cost of sales (including depreciation and depletion) Concept (Monetary) For Period Debit ifrs-full:CostOfSales
22 (Loss) earnings from mine operations Concept (Monetary) For Period Credit ifrs-full:GrossProfit
23 Corporate and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
24 Loss on sale of asset Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
25 Impairment of El Sauzal Plant Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossRecognisedInProfitOrLoss
26 (Loss) earnings from operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
27 Other income, net Concept (Monetary) For Period Credit alo:OtherNonoperatingIncomeExpenseNet
28 Finance income, net Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
29 Gain (loss) on derivative contracts Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
30 Foreign exchange gain (loss) Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
31 (Loss) earnings before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
32 Income taxes Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
33 Current tax expense Concept (Monetary) For Period Debit ifrs-full:CurrentTaxExpenseIncome
34 Deferred tax (recovery) expense Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
35 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
36 (Loss) earnings and comprehensive (loss) income for the period Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
37 Weighted average shares outstanding: Abstract ifrs-full:WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract
38 Basic Concept (Shares) For Period ifrs-full:WeightedAverageShares
39 Diluted Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
40 (Loss) earnings per share: Abstract ifrs-full:EarningsPerShareAbstract
41 Basic Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
42 Diluted Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
43 100020 - Statement - Consolidated Statements of Cash Flows Network

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44 Statement Of Cash Flows [Table] Table

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45 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
46 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
47 Rye Patch [member] Member alo:RyePatchMember
48 Caballo Blanco Property Member alo:CaballoBlancoPropertyMember
49 Statement Of Cash Flows [Line Items] LineItems alo:StatementOfCashFlowsLineItems
50 OPERATING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
51 (Loss) earnings before income taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
52 Items not affecting cash: Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
53 Depletion and depreciation Concept (Monetary) For Period Debit alo:AdjustmentsForDepletionAndDepreciation
54 Finance income, net Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForFinanceIncome
55 (Gain) loss on derivative contracts Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives
56 Share-based payments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
57 Other provision revaluation Concept (Monetary) For Period Debit alo:AdjustmentsForOtherProvisionRevaluation
58 Loss on property sale Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets
59 Impairment of El Sauzal Plant Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLossExplorationAndEvaluationAssets
60 Unrealized foreign exchange loss Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
61 Non cash items including earnings before tax Concept (Monetary) For Period alo:AdjustmentsForNonCashItemsIncludingProfitLoss
62 Changes in non-cash working capital items: Abstract alo:ChangesInNonCashWorkingCapitalItemsAbstract
63 Trade and other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
64 Inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
65 Advances and prepaid expenses Concept (Monetary) For Period Debit alo:AdjustmentsForDecreaseIncreaseInAdvancesAndPrepaidExpenses
66 Trade payables and accrued liabilities Concept (Monetary) For Period Debit alo:AdjustmentsForIncreaseDecreaseInTradePayablesAndAccruedLiabilities
67 Income tax paid Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidClassifiedAsOperatingActivities
68 Cash (used in) provided by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
69 INVESTING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
70 Expenditures on mineral properties, property, plant and equipment Concept (Monetary) For Period Credit alo:PurchaseOfMineralPropertiesAndPlantAndEquipmentClassifiedAsInvestingActivities
71 Expenditures on exploration and evaluation Concept (Monetary) For Period Credit ifrs-full:PurchaseOfExplorationAndEvaluationAssets
72 Proceeds from Coeur shares sale, net of transaction costs Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
73 Purchase of short-term investments Concept (Monetary) For Period Credit alo:PurchaseOfShortTermInvestments
74 Short-term investments maturity Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities
75 Interest received on short-term investments Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsInvestingActivities
76 Cash acquired in connection with Rye Patch, net of cash consideration paid Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
77 Refund of reclamation bonds Concept (Monetary) For Period Debit alo:ProceedsFromRefundOfReclamationBonds
78 Caballo Blanco Property sale proceeds Concept (Monetary) For Period Debit alo:ProceedsFromSalesOfPropertyNetOfTransactionCosts
79 Cash provided by (used in) investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
80 FINANCING ACTIVITIES Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
81 Repayment of equipment financing Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
82 Proceeds from equipment financing, net of transaction costs Concept (Monetary) For Period Debit alo:ProceedsFromEquipmentFinancingNetOfTransactionCosts
83 Credit facility principal payments Concept (Monetary) For Period Credit alo:PaymentOfCreditFacilityPrincipalAmount
84 Credit facility amendment fees Concept (Monetary) For Period Credit alo:PaymentOfCreditFacilityAmendmentFees
85 Interest payments Concept (Monetary) For Period Credit alo:PaymentOfInterestClassifiedAsFinancingActivities
86 Proceeds from equity financing, net of transaction costs Concept (Monetary) For Period Debit alo:ProceedsFromEquityFinancingNetOfTransactionCosts
87 Proceeds from warrants exercise Concept (Monetary) For Period Debit alo:ProceedsFromWarrantsExercise
88 Proceeds from options exercise Concept (Monetary) For Period Debit ifrs-full:ProceedsFromExerciseOfOptions
89 Cash (used in) provided by financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
90 Effects of exchange rate changes on the balance of cash held in foreign currencies Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
91 Decrease in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
92 Cash and cash equivalents, beginning of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
93 Cash and cash equivalents, end of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
94 100030 - Statement - Consolidated Statements of Financial Position Network

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95 Implied Table Table

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96 Statement Of Financial Position [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
97 ASSETS Abstract ifrs-full:AssetsAbstract
98 Current Abstract ifrs-full:CurrentAssetsAbstract
99 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
100 Short-term investments Concept (Monetary) As Of Debit ifrs-full:CurrentHeldtomaturityInvestments
101 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
102 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
103 Advances and prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
104 Derivative asset Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
105 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
106 Non-current inventories Concept (Monetary) As Of Debit ifrs-full:NoncurrentInventories
107 Mineral properties, plant and equipment, exploration and evaluation Concept (Monetary) As Of Debit alo:MineralPropertiesPlantAndEquipmentExplorationAndEvaluation
108 Reclamation bonds Concept (Monetary) As Of Debit alo:ReclamationBonds
109 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
110 LIABILITIES Abstract ifrs-full:LiabilitiesAbstract
111 Current Abstract ifrs-full:CurrentLiabilitiesAbstract
112 Trade payables and accrued liabilities Concept (Monetary) As Of Credit alo:TradePayablesAndAccruedLiabilitiesCurrent
113 Current portion of equipment loans payable Concept (Monetary) As Of Credit alo:CurrentPortionOfEquipmentLoansPayables
114 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherShorttermProvisions
115 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
116 Equipment loans payable Concept (Monetary) As Of Credit alo:NoncurrentPortionOfEquipmentLoansPayables
117 Other financial liability Concept (Monetary) As Of Credit ifrs-full:OtherFinancialLiabilities
118 Warrant liability Concept (Monetary) As Of Credit alo:WarrantLiability
119 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
120 Provision for site reclamation and closure Concept (Monetary) As Of Credit alo:ProvisionForSiteReclamationAndClosure
121 Other provisions Concept (Monetary) As Of Credit ifrs-full:OtherLongtermProvisions
122 Other Concept (Monetary) As Of Credit ifrs-full:OtherNoncurrentFinancialLiabilities
123 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
124 EQUITY Abstract ifrs-full:EquityAbstract
125 Issued capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
126 Share-based payment reserve Concept (Monetary) As Of Credit ifrs-full:ReserveOfSharebasedPayments
127 Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
128 Total equity Concept (Monetary) As Of Credit ifrs-full:Equity
129 Total liabilities and equity Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
130 100040 - Statement - Consolidated Statements of Changes in Equity Network

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131 Statement Of Changes In Equity [Table] Table

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132 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
133 Equity [member] Member ifrs-full:EquityMember
134 Issued Capital Member ifrs-full:IssuedCapitalMember
135 Share-based Payment Reserve Member ifrs-full:ReserveOfSharebasedPaymentsMember
136 (Deficit) Retained Earnings Member ifrs-full:RetainedEarningsMember
137 Statement Of Changes In Equity [Line Items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
138 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
139 Beginning balance, shares Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
140 Earnings (loss) and comprehensive income (loss) for the period Concept (Monetary) For Period Credit alo:NetEarningsLossAndComprehensiveIncomeLoss
141 Shares issued to acquire Rye Patch Gold Corp. Concept (Monetary) For Period Credit alo:SharesIssuedToAcquireBusiness
142 Shares, net of share issuance costs Concept (Monetary) For Period Credit ifrs-full:IssueOfEquity
143 Shares, net of share issuance costs, shares Concept (Shares) For Period alo:NumberOfCommonStockIssuedNetOfCosts
144 Share options Concept (Monetary) For Period Credit alo:ShareOptionsValue
145 Shares issued to settle other financial liability Concept (Monetary) For Period Credit alo:CommonSharesValueIssuedToSettleOtherFinancialLiability
146 Shares issued to settle other financial liability, shares Concept (Shares) For Period alo:NumberOfCommonSharesIssuedToSettleOtherFinancialLiability
147 Equity settled share-based payments Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
148 Shares issued for cash equity financing Concept (Monetary) For Period Credit alo:CommonStockIssuedDuringPeriodValueForEquityFinancing
149 Shares issued for cash equity financing, shares Concept (Shares) For Period alo:NumberSharesOfCommonStockIssuedDuringPeriodForEquityFinancing
150 Shares issued on exercise of warrants Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
151 Shares issued on exercise of warrants, shares Concept (Shares) For Period alo:NumberOfSharesIssuedOnExerciseOfWarrants
152 Shares issued on exercise of share options Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
153 Shares issued on exercise of share options, shares Concept (Shares) For Period alo:CommonStockIssuedDuringPeriodSharesStockOptionExercised
154 Ending balance Concept (Monetary) As Of Credit ifrs-full:Equity
155 Ending balance, shares Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
156 100050 - Disclosure - Nature of Operations Network

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157 Implied Table Table

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158 Disclosure Of Nature Of Operations [Abstract] Abstract alo:DisclosureOfNatureOfOperationsAbstract
159 Nature of Operations Concept (Text Block (HTML)) For Period alo:DisclosureOfNatureOfOperationsExplanatory
160 100060 - Disclosure - Basis of Preparation Network

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161 Implied Table Table

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162 Basis Of Preparation [Abstract] Abstract alo:BasisOfPreparationAbstract
163 Basis of Preparation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
164 100070 - Disclosure - Significant Accounting Policies Network

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165 Implied Table Table

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166 Disclosure Of Significant Accounting Policies [Abstract] Abstract alo:DisclosureOfSignificantAccountingPoliciesAbstract
167 Significant Accounting Policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
168 100080 - Disclosure - Recent Accounting Pronouncements Network

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169 Implied Table Table

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170 Disclosure Of Recent Accounting Pronouncements [Abstract] Abstract alo:DisclosureOfRecentAccountingPronouncementsAbstract
171 Recent Accounting Pronouncements Concept (Text Block (HTML)) For Period alo:DisclosureOfRecentAccountingPronouncementsExplanatory
172 100090 - Disclosure - Rye Patch Acquisition Network

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173 Implied Table Table

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174 Disclosure Of Business Combinations [Abstract] Abstract ifrs-full:DisclosureOfBusinessCombinationsAbstract
175 Rye Patch Acquisition Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBusinessCombinationsExplanatory
176 100100 - Disclosure - Property Sale Network

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177 Implied Table Table

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178 Acquisitiondate Fair Value Of Total Consideration Transferred [Abstract] Abstract ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
179 Property Sale Concept (Text Block (HTML)) For Period alo:DisclosureOfPropertySaleExplanatory
180 100110 - Disclosure - Expenses Network

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181 Implied Table Table

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182 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
183 Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesExplanatory
184 100120 - Disclosure - Trade and Other Receivables Network

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185 Implied Table Table

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186 Trade And Other Current Receivables [Abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
187 Trade and Other Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
188 100130 - Disclosure - Inventories Network

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189 Implied Table Table

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190 Disclosure Of Inventories [Abstract] Abstract alo:DisclosureOfInventoriesAbstract
191 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
192 100140 - Disclosure - Mineral Properties, Plant and Equipment, Exploration and Evaluation Network

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193 Implied Table Table

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194 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Abstract] Abstract alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationAbstract
195 Mineral Properties, Plant and Equipment, Exploration and Evaluation Concept (Text Block (HTML)) For Period alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluation
196 100150 - Disclosure - Reclamation Bonds Network

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197 Implied Table Table

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198 Disclosure Of Reclamation Bonds [Abstract] Abstract alo:DisclosureOfReclamationBondsAbstract
199 Reclamation Bonds Concept (Text Block (HTML)) For Period alo:DisclosureOfReclamationBondsExplanatory
200 100160 - Disclosure - Trade Payables and Accrued Liabilities Network

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201 Implied Table Table

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202 Trade And Other Payables [Abstract] Abstract ifrs-full:TradeAndOtherPayablesAbstract
203 Trade Payables and Accrued Liabilities Concept (Text Block (HTML)) For Period alo:DisclosureOfTradePayablesAndAccruedLiabilitiesExplanatory
204 100170 - Disclosure - Credit Facility Network

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206 Disclosure Of Credit Facility [Abstract] Abstract alo:DisclosureOfCreditFacilityAbstract
207 Credit Facility Concept (Text Block (HTML)) For Period alo:DisclosureOfCreditFacilityExplanatory
208 100180 - Disclosure - Equipment Loans Payable Network

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209 Implied Table Table

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210 Disclosure Of Equipment Loan Payable [Abstract] Abstract alo:DisclosureOfEquipmentLoanPayableAbstract
211 Disclosure Of Equipment Loans Payable Explanatory Concept (Text Block (HTML)) For Period alo:DisclosureOfEquipmentLoanPayableExplanatory
212 100190 - Disclosure - Warrant Liability Network

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213 Implied Table Table

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214 Disclosure Of Warrant Liability [Abstract] Abstract alo:DisclosureOfWarrantLiabilityAbstract
215 Warrant Liability Concept (Text Block (HTML)) For Period alo:DisclosureOfWarrantLiabilityExplanatory
216 100200 - Disclosure - Other Financial Liability Network

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217 Implied Table Table

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218 Disclosure Of Financial Liabilities [Abstract] Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
219 Other Financial Liability Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
220 100210 - Disclosure - Provision for Site Reclamation and Closure Network

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221 Implied Table Table

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222 Disclosure Of Provision For Site Reclamation And Closure [Abstract] Abstract alo:DisclosureOfProvisionForSiteReclamationAndClosureAbstract
223 Provision for Site Reclamation and Closure Concept (Text Block (HTML)) For Period alo:DisclosureProvisionForSiteReclamationAndClosureExplanatory
224 100220 - Disclosure - Equity Network

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225 Implied Table Table

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226 Equity [Abstract] Abstract ifrs-full:EquityAbstract
227 Equity Concept (Text Block (HTML)) For Period alo:DisclosureOfEquityExplanatory
228 100230 - Disclosure - Income Taxes Network

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229 Implied Table Table

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230 Disclosure Of Income Taxes [Abstract] Abstract alo:DisclosureOfIncomeTaxesAbstract
231 Income Taxes Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
232 100240 - Disclosure - (Loss) Earnings Per Share Network

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233 Implied Table Table

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234 Earnings Per Share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
235 (Loss) Earnings Per Share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
236 100250 - Disclosure - Supplemental Disclosure With Respect To Cash Flows Network

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237 Implied Table Table

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239 Supplemental Disclosure with Respect to Cash Flows Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
240 100260 - Disclosure - Financial Instruments And Risk Management Network

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242 Financial Instruments And Risk Management [Abstract] Abstract alo:FinancialInstrumentsAndRiskManagementAbstract
243 Financial Instruments and Risk Management Concept (Text Block (HTML)) For Period alo:DisclosureOfFinancialInstrumentsAndRiskManagementExplanatory
244 100270 - Disclosure - Related Party Transactions Network

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246 Disclosure Of Transactions Between Related Parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
247 Related Party Transactions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
248 100280 - Disclosure - Management of Capital Network

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251 Management of Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory
252 100290 - Disclosure - Commitments and Contingencies Network

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255 Commitments and Contingencies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory
256 100300 - Disclosure - Segmented Information Network

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259 Segmented Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory
260 100310 - Disclosure - Significant Accounting Policies (Policies) Network

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261 Implied Table Table

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262 Disclosure Of Significant Accounting Policies [Abstract] Abstract alo:DisclosureOfSignificantAccountingPoliciesAbstract
263 Basis of consolidation Concept (Text Block (HTML)) For Period alo:DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatory
264 Foreign currency translation Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
265 Cash and cash equivalents and restricted cash Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory
266 Short-term investments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForHeldtomaturityInvestmentsExplanatory
267 Revenue recognition Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
268 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
269 Mineral properties, plant and equipment, exploration and evaluation Concept (Text Block (HTML)) For Period alo:DescriptionOfAccountingPolicyForMineralPropertiesPlantAndEquipmentExplorationAndEvaluationExplanatory
270 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
271 Share-based payments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
272 Share purchase warrants Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForWarrantsExplanatory
273 Issued capital Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIssuedCapitalExplanatory
274 Financial Instruments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
275 Financial assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialAssetsExplanatory
276 Financial liabilities and equity Concept (Text Block (HTML)) For Period alo:DescriptionOfAccountingPolicyForFinancialLiabilitiesAndEquityExplanatory
277 Financial instruments designated as hedging instruments Concept (Text Block (HTML)) For Period alo:DescriptionOfAccountingPolicyForFinancialInstrumentsDesignatedAsHedgingInstrumentsExplanatory
278 Impairment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
279 Impairment of non-financial assets Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
280 Taxes Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
281 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
282 Borrowing costs Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForBorrowingCostsExplanatory
283 100320 - Disclosure - Significant Accounting Policies (Tables) Network

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284 Implied Table Table

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285 Disclosure Of Significant Accounting Policies [Abstract] Abstract alo:DisclosureOfSignificantAccountingPoliciesAbstract
286 Schedule of Depreciation Methods and Rates of Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
287 100330 - Disclosure - Rye Patch Acquisition (Tables) Network

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288 Implied Table Table

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289 Disclosure Of Business Combinations [Abstract] Abstract ifrs-full:DisclosureOfBusinessCombinationsAbstract
290 Summary of Fair Value Assumptions of Replacement Warrants and Options Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
291 Consideration Paid on Assets Acquired and Liabilities Based on Estimated Fair Values Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOffsettingOfFinancialAssetsExplanatory
292 100340 - Disclosure - Property Sale (Table) Network

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293 Implied Table Table

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294 Acquisitiondate Fair Value Of Total Consideration Transferred [Abstract] Abstract ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
295 Schedule of Loss on Sale of Property Explanatory Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleExplanatory
296 100350 - Disclosure - Expenses (Tables) Network

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297 Implied Table Table

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298 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
299 Schedule of Cost of Sales Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCostOfSalesExplanatory
300 Summary of Corporate and Administrative Expenses Concept (Text Block (HTML)) For Period alo:DisclosureOfCorporateAndAdministrativeExpensesExplanatory
301 Summary of Finance Income, Net Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceIncomeExplanatory
302 100360 - Disclosure - Trade and Other Receivables (Tables) Network

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303 Implied Table Table

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304 Trade And Other Current Receivables [Abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
305 Summary of Detailed Information about Trade and Other Receivables Concept (Text Block (HTML)) For Period alo:DisclosureOfDetailedInformationAboutTradeAndOtherReceivables
306 100370 - Disclosure - Inventories (Tables) Network

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307 Implied Table Table

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308 Disclosure Of Inventories [Abstract] Abstract alo:DisclosureOfInventoriesAbstract
309 Summary of Inventories Concept (Text Block (HTML)) For Period alo:DisclosureOfInformationAboutInventoriesExplanatory
310 100380 - Disclosure - Mineral Properties, Plant and Equipment, Exploration and Evaluation (Tables) Network

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311 Implied Table Table

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312 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Abstract] Abstract alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationAbstract
313 Schedule of Reconciliation of Changes in Mineral Properties, Plant and Equipment, Exploration and Evaluation Concept (Text Block (HTML)) For Period alo:DisclosureOfReconciliationOfChangesInMineralPropertiesPlantAndEquipmentExplorationAndEvaluationExplanatory
314 Schedule of Carrying Amount of Mineral Properties, Plant and Equipment Exploration and Evaluation by Segment Concept (Text Block (HTML)) For Period alo:DisclosureOfCarryingAmountOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationBySegmentExplanatory
315 100390 - Disclosure - Trade Payables and Accrued Liabilities (Tables) Network

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316 Implied Table Table

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317 Trade And Other Payables [Abstract] Abstract ifrs-full:TradeAndOtherPayablesAbstract
318 Summary of Trade Payables and Accrued Liabilities Concept (Text Block (HTML)) For Period alo:DisclosureOfDetailedInformationAboutTradePayablesAndAccruedLiabilitiesExplanatory
319 100400 - Disclosure - Equipment Loans Payable (Tables) Network

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320 Implied Table Table

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321 Disclosure Of Equipment Loan Payable [Abstract] Abstract alo:DisclosureOfEquipmentLoanPayableAbstract
322 Equipment Loans Payable Concept (Text Block (HTML)) For Period alo:DisclosureOfDetailInformationAboutEquipmentLoanPayable
323 100410 - Disclosure - Warrant Liability (Tables) Network

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324 Implied Table Table

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325 Disclosure Of Classes Of Share Capital [Abstract] Abstract ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
326 Schedule of Warrants Concept (Text Block (HTML)) For Period alo:DisclosureOfDetailedInformationAboutWarrantsExplanatory
327 Summary of Revaluation of Share Purchase Warrants Concept (Text Block (HTML)) For Period alo:DisclosureOfRevaluationOfWarrantsExplanatory
328 Schedule of (Gain) Loss on Revaluation of Share Purchase Warrant Liabilities Concept (Text Block (HTML)) For Period alo:DisclosureOfGainLossOnRevaluationOfWarrantsExplanatory
329 100420 - Disclosure - Provision for Site Reclamation and Closure (Tables) Network

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330 Implied Table Table

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331 Disclosure Of Provision For Site Reclamation And Closure [Abstract] Abstract alo:DisclosureOfProvisionForSiteReclamationAndClosureAbstract
332 Summary of Detailed Information about Provision for Site Reclamation and Closure Concept (Text Block (HTML)) For Period alo:DisclosureOfDetailedInformationAboutProvisionForSiteReclamationAndClosureExplanatory
333 100430 - Disclosure - Equity (Tables) Network

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334 Implied Table Table

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335 Equity [Abstract] Abstract ifrs-full:EquityAbstract
336 Summary of Share Option Transactions and Number of Share Options Outstanding Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
337 Schedule of Share Options Outstanding and Exercisable Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory
338 Summary of Weighted Average Assumptions Used for Valuation of Share Options Granted Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory
339 Schedule of Grants of Deferred Share Units, Restricted Share Units and Performance Share Units under Long-Term Incentive Plan Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedOtherEquityInstrumentsGrantedDuringPeriodExplanatory
340 100440 - Disclosure - Income Taxes (Tables) Network

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341 Implied Table Table

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342 Disclosure Of Income Taxes [Abstract] Abstract alo:DisclosureOfIncomeTaxesAbstract
343 Schedule of Reconciliation of Income Taxes Concept (Text Block (HTML)) For Period alo:DisclosureOfReconciliationOfIncomeTaxExpenseBenefitExplanatory
344 Schedule of Deferred Tax Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
345 Schedule of Unrecognized Tax Losses, Deductible Temporary Differences, and Tax Credits Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
346 100450 - Disclosure - (Loss) Earnings Per Share (Tables) Network

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347 Implied Table Table

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348 Earnings Per Share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
349 Summary of (Loss) Earnings Per Share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
350 100460 - Disclosure - Supplemental Disclosure With Respect To Cash Flows (Tables) Network

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351 Implied Table Table

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352 Supplemental Disclosure With Respect To Cash Flows [Abstract] Abstract alo:SupplementalDisclosureWithRespectToCashFlowsAbstract
353 Schedule of Significant Non-cash Transactions Concept (Text Block (HTML)) For Period alo:DisclosureOfSignificantNonCashTransactionsExplanatory
354 100470 - Disclosure - Financial Instruments And Risk Management (Tables) Network

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355 Implied Table Table

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356 Financial Instruments And Risk Management [Abstract] Abstract alo:FinancialInstrumentsAndRiskManagementAbstract
357 Summary of Net Monetary Assets and Liabilities Held in Foreign Currencies Concept (Text Block (HTML)) For Period alo:DisclosureOfNetMonetaryAssetsLiabilitiesByCurrencyExplanatory
358 100480 - Disclosure - Related Party Transactions (Tables) Network

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359 Implied Table Table

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360 Disclosure Of Transactions Between Related Parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
361 Summary of Key Management Compensation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
362 100490 - Disclosure - Management of Capital (Tables) Network

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363 Implied Table Table

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364 Disclosure Of Objectives Policies And Processes For Managing Capital [Abstract] Abstract ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
365 Summary of Capital Concept (Text Block (HTML)) For Period alo:DisclosureOfDetailedInformationAboutCapitalManagementExplanatory
366 100500 - Disclosure - Commitments and Contingencies (Tables) Network

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367 Implied Table Table

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368 Disclosure Of Commitments And Contingencies [Abstract] Abstract alo:DisclosureOfCommitmentsAndContingenciesAbstract
369 Summary of Undiscounted Liabilities and Future Operating Commitments Concept (Text Block (HTML)) For Period alo:DisclosureOfUndiscountedLiabilitiesAndFutureOperatingCommitmentsExplanatory
370 100510 - Disclosure - Segmented Information (Tables) Network

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371 Implied Table Table

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372 Disclosure Of Operating Segments [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
373 Schedule of Segmented Information Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOperatingSegmentsExplanatory
374 Percentage of Metal Revenues by Major Customers Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSegmentsMajorCustomersExplanatory
375 Company's Metal Revenues from Operations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProductsAndServicesExplanatory
376 100520 - Disclosure - Nature of Operations - Additional Information (Details) Network

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377 Disclosure Of Nature Of Operations [Table] Table

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378 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
379 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
380 Ana Paula Property Member alo:AnaPaulaPropertyMember
381 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
382 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
383 Mexico Member country:MX
384 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
385 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
386 Minera Aurea Member alo:MineraAureaMember
387 Business Acquisition Axis us-gaap:BusinessAcquisitionAxis
388 Business Acquisition Acquiree Member us-gaap:BusinessAcquisitionAcquireeDomain
389 Rye Patch [member] Member alo:RyePatchMember
390 Disclosure Of Nature Of Operations [Line Items] LineItems alo:DisclosureOfNatureOfOperationsLineItems
391 Proportion of ownership interest in property Concept (Percent) For Period alo:ProportionOfOwnershipInterestInProperty
392 Percentage of ownership interest acquired Concept (Percent) For Period alo:PercentageOfOwnershipInterestAcquired
393 100530 - Disclosure - Significant Accounting Policies - Additional Information (Details) Network

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394 Disclosure Of Significant Accounting Policies [Table] Table

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395 New IFRSs [axis] Axis ifrs-full:NewIFRSsAxis
396 New IFRSs [member] Member ifrs-full:NewIFRSsMember
397 IFRS 9 Member alo:IFRSNineMember
398 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
399 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
400 Deferred Share Units Member alo:DeferredShareUnitsMember
401 Restricted Share Units Member alo:RestrictedShareUnitsMember
402 Disclosure Of Significant Accounting Policies [Line Items] LineItems alo:DisclosureOfSignificantAccountingPoliciesLineItems
403 Financial instruments designated as hedges Concept (Monetary) As Of ifrs-full:FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
404 Share based payment arrangement other equity instruments conversion ratio Concept (Shares) As Of alo:SharebasedPaymentArrangementOtherEquityInstrumentsConversionRatioInShares
405 Share based payment arrangement vesting period Concept (xbrli:durationItemType) For Period alo:SharebasedPaymentArrangementVestingPeriod
406 Current financial assets at amortised cost Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtAmortisedCost
407 Non-current financial assets at amortised cost Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssetsAtAmortisedCost
408 Equity instruments designated as FVTOCI Concept (Monetary) As Of Debit ifrs-full:FairValueOfInvestmentsInEquityInstrumentsDesignatedAsMeasuredAtFairValueThroughOtherComprehensiveIncome
409 Gain (loss) recognized on equity instruments transaction Concept (Monetary) For Period Credit alo:GainLossRecognizedOnEquityInstrumentsTransaction
410 Impairment loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
411 100540 - Disclosure - Significant Accounting Policies - Schedule of Depreciation Methods and Rates of Plant and Equipment (Details) Network

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412 Disclosure Of Property Plant And Equipment [Table] Table

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413 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
414 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
415 Computer Equipment Member ifrs-full:ComputerEquipmentMember
416 Leasehold Improvements Member ifrs-full:LeaseholdImprovementsMember
417 Office Furniture and Equipment Member ifrs-full:OfficeEquipmentMember
418 Vehicles Member ifrs-full:VehiclesMember
419 Mine Equipment and Buildings Member alo:MineEquipmentAndBuildingsMember
420 Plant and Equipment Member alo:PlantAndEquipmentMember
421 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
422 Depreciation methods and rates, property, plant and equipment Concept (Text/String) For Period alo:DepreciationMethodsAndRatesPropertyPlantAndEquipment
423 100550 - Disclosure - Recent Accounting Pronouncements - Additional Information (Details) Network

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424 Implied Table Table

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425 Disclosure Of Recent Accounting Pronouncements [Abstract] Abstract alo:DisclosureOfRecentAccountingPronouncementsAbstract
426 Description of life and other significant terms of arrangement involving legal form of lease Concept (Text/String) For Period ifrs-full:DescriptionOfLifeAndOtherSignificantTermsOfArrangementInvolvingLegalFormOfLease
427 100560 - Disclosure - Rye Patch Acquisition - Additional Information (Details) Network

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428 Disclosure Of Business Combinations [Table] Table

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429 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
430 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
431 Rye Patch [member] Member alo:RyePatchMember
432 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
433 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
434 Warrants [Member] Member alo:WarrantsMember
435 Options [Member] Member alo:ShareOptionsMember
436 Disclosure Of Business Combinations [Line Items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
437 Acquisition, exchange ratio of common share of acquiree Concept (Percent) As Of alo:BusinessCombinationExchangeRateOfCommonShare
438 cash consideration Concept (Share) As Of alo:CashConsiderationPerShare
439 Number of shares issued Concept (Decimal) As Of ifrs-full:NumberOfInstrumentsOrInterestsIssuedOrIssuable
440 Cash paid to former shareholders Concept (Monetary) As Of Credit ifrs-full:CashTransferred
441 Weighted average fair value Concept (Monetary) As Of Credit ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
442 Total consideration paid Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
443 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
444 Net earning Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
445 Pro forma revenue Concept (Monetary) For Period Credit alo:ProFormaRevenue
446 Pro forma net loss Concept (Monetary) For Period Credit alo:ProFormaNetLoss
447 100570 - Disclosure - Rye Patch Acquisition - Summary of Replacement Warrants (Details) Network

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448 Disclosure Of Business Combinations [Table] Table

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449 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
450 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
451 Rye Patch [member] Member alo:RyePatchMember
452 Range [axis] Axis ifrs-full:RangeAxis
453 Ranges [member] Member ifrs-full:RangesMember
454 Minimum [Member] Member ifrs-full:BottomOfRangeMember
455 Maximum [Member] Member ifrs-full:TopOfRangeMember
456 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
457 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
458 Warrants [Member] Member alo:WarrantsMember
459 Disclosure Of Business Combinations [Line Items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
460 Risk-free interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
461 Expected life of warrants Concept (xbrli:durationItemType) For Period alo:ExpectedLife
462 Annualized volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
463 Dividend rate Concept (Percent) For Period ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
464 100580 - Disclosure - Rye Patch Acquisition - Summary of Replacement Options (Details) Network

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465 Disclosure Of Business Combinations [Table] Table

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466 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
467 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
468 Rye Patch [member] Member alo:RyePatchMember
469 Range [axis] Axis ifrs-full:RangeAxis
470 Ranges [member] Member ifrs-full:RangesMember
471 Minimum [Member] Member ifrs-full:BottomOfRangeMember
472 Maximum [Member] Member ifrs-full:TopOfRangeMember
473 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
474 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
475 Options [Member] Member alo:ShareOptionsMember
476 Disclosure Of Business Combinations [Line Items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
477 Risk-free interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
478 Expected life of warrants Concept (xbrli:durationItemType) For Period alo:ExpectedLife
479 Annualized volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
480 Forfeiture rate Concept (Percent) For Period alo:ForfeitureRate
481 Dividend rate Concept (Percent) For Period ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
482 100590 - Disclosure - Rye Patch Acquisition - Consideration Paid on Assets Acquired and Liabilities Based on Estimated Fair Values (Details) Network

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483 Disclosure Of Business Combinations [Table] Table

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484 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
485 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
486 Rye Patch [member] Member alo:RyePatchMember
487 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
488 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
489 Common Shares [Member] Member alo:CommonSharesMember
490 Warrants [Member] Member alo:WarrantsMember
491 Options [Member] Member alo:ShareOptionsMember
492 Disclosure Of Business Combinations [Line Items] LineItems ifrs-full:DisclosureOfBusinessCombinationsLineItems
493 Consideration paid Abstract alo:AcquisitionDateFairValueOfConsiderationPaidAbstract
494 Equity interest Concept (Monetary) As Of Credit ifrs-full:EquityInterestsOfAcquirer
495 Cash paid to former shareholders Concept (Monetary) As Of Credit ifrs-full:CashTransferred
496 Total consideration Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
497 Allocation of consideration Abstract ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
498 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsRecognisedAsOfAcquisitionDate
499 Trade and other receivables Concept (Monetary) As Of Debit alo:TradeAndOtherReceivablesRecognisedAsOfAcquisitionDate
500 Inventories Concept (Monetary) As Of Debit ifrs-full:InventoryRecognisedAsOfAcquisitionDate
501 Advances and prepaid expenses Concept (Monetary) As Of Debit ifrs-full:NoncurrentPrepayments
502 Mineral properties, plant and equipment, exploration and evaluation Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate
503 Assets held for sale (note 6) Concept (Monetary) As Of Debit alo:AssetsHeldForSaleRecognisedAsOfAcquisitionDate
504 Reclamation bonds Concept (Monetary) As Of Debit alo:ReclamationBondsRecognisedAsOfAcquisitionDate
505 Trade payables and accrued liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesRecognisedAsOfAcquisitionDate
506 Other financial liability Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesRecognisedAsOfAcquisitionDate
507 Provision for site reclamation and closure Concept (Monetary) As Of Credit alo:ProvisionForSiteReclamationAndClosureRecognisedAsOfAcquisitionDate
508 Credit facility Concept (Monetary) As Of Credit ifrs-full:BorrowingsRecognisedAsOfAcquisitionDate
509 Equipment loan payable Concept (Monetary) As Of Credit alo:EquipmentLoanPayableRecognisedAsOfAcquisitionDate
510 Derivative liability Concept (Monetary) As Of Credit alo:DerivativeLiabilityRecognisedAsOfAcquisitionDate
511 Deferred tax liability Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate
512 Total consideration Concept (Monetary) As Of Credit ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
513 100600 - Disclosure - Property Sale - Additional Information (Details) Network

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514 Disclosure Of Assets Disposal [Table] Table

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515 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
516 Counterparties [member] Member ifrs-full:CounterpartiesMember
517 Coeur Rochester Inc Member alo:CoeurRochesterIncMember
518 Disclosure Of Assets Disposal [Line Items] LineItems alo:DisclosureOfAssetsDisposalLineItems
519 Proceeds from sale of assets Concept (Monetary) For Period Credit alo:ProceedsFromSaleOfAsset
520 Number of trading periods used to value common stock received as consideration for sale of assets Concept (Integer) For Period alo:TradingPeriod
521 Value of Common Stock Shares received as consideration for sale of assets Concept (Monetary) As Of Debit alo:CommonStockSharesReceivedAsConsiderationForPropertySaleValue
522 Loss on disposal of assets Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfOtherNoncurrentAssets
523 Loss on sale of shares Concept (Monetary) For Period Debit alo:LossOnSaleOfShares
524 100610 - Disclosure - Property Sale - Schedule of Loss on Sale of Property Explanatory (Details) Network

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525 Disclosure Of Assets Disposal [Table] Table

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 alo:DisclosureOfAssetsDisposalTable
526 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
527 Counterparties [member] Member ifrs-full:CounterpartiesMember
528 Lincoln Hill Project, Wilco Project, Gold Ridge exploration and evaluation costs [Member] Member alo:LincolnHillProjectWilcoProjectGoldRidgeExplorationAndEvaluationCostsMember
529 Disclosure Of Assets Disposal [Line Items] LineItems alo:DisclosureOfAssetsDisposalLineItems
530 Fair value of proceeds Abstract alo:FairValueOfProceedsAbstract
531 Cash received from disposal of Coeur common shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
532 Book value of net assets sold Abstract alo:BookValueOfNetAssetsSoldAbstract
533 Lincoln Hill Project, Wilco Project, Gold Ridge exploration and evaluation costs Concept (Monetary) As Of Debit alo:BookValueOfNetAssetsSold
534 Legal and other expenses Concept (Monetary) For Period Debit alo:LegalAndOtherExpenses
535 Loss on disposal Concept (Monetary) For Period Debit ifrs-full:LossesOnDisposalsOfInvestmentProperties
536 100620 - Disclosure - Expenses - Schedule of Cost of Sales (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureExpensesScheduleOfCostOfSalesDetails
537 Implied Table Table

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*

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538 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
539 Costs of contract mining Concept (Monetary) For Period Debit alo:CostsOfContractMining
540 Crushing and gold recovery costs Concept (Monetary) For Period Debit alo:CrushingAndGoldRecoveryCosts
541 Mine site administration costs Concept (Monetary) For Period Debit alo:MineSiteAdministrationCosts
542 Transport and refining Concept (Monetary) For Period Debit alo:TransportAndRefining
543 Royalties Concept (Monetary) For Period Debit ifrs-full:RoyaltyExpense
544 Change in inventories Concept (Monetary) For Period Debit alo:ChangeInInventories
545 Production costs Concept (Monetary) For Period Debit alo:ProductionCosts1
546 Depreciation and depletion Concept (Monetary) For Period Debit alo:DepreciationAndDepletion
547 Cost of sales (including depreciation and depletion) Concept (Monetary) For Period Debit ifrs-full:CostOfSales
548 100630 - Disclosure - Expenses - Schedule of Cost of Sales (Parenthetical) (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureExpensesScheduleOfCostOfSalesParentheticalDetails
549 Implied Table Table

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550 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
551 Impairment on Inventory Concept (Monetary) For Period ifrs-full:InventoryWritedown2011
552 100640 - Disclosure - Expenses - Summary of Corporate and Administrative Expenses (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureExpensesSummaryOfCorporateAndAdministrativeExpensesDetails
553 Implied Table Table

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554 Corporate And Administrative Expenses [Abstract] Abstract alo:CorporateAndAdministrativeExpensesAbstract
555 Salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
556 Consulting and professional fees Concept (Monetary) For Period Debit ifrs-full:ProfessionalFeesExpense
557 Share-based payments Concept (Monetary) For Period Debit alo:ShareBasedPaymentExpense
558 Rent and office costs Concept (Monetary) For Period Debit ifrs-full:RentalExpense
559 Administrative and other Concept (Monetary) For Period Debit alo:AdministrativeAndOtherExpenses
560 Corporate and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
561 100650 - Disclosure - Expenses - Summary of Corporate and Administrative Expenses (Parenthetical) (Details) Network

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562 Corporate And Administrative Expenses [Table] Table

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 alo:CorporateAndAdministrativeExpensesTable
563 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
564 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
565 Rye Patch [member] Member alo:RyePatchMember
566 Corporate And Administrative Expenses [Line Items] LineItems alo:CorporateAndAdministrativeExpensesLineItems
567 Termination benefits Concept (Monetary) For Period Debit ifrs-full:TerminationBenefitsExpense
568 Transaction costs Concept (Monetary) For Period Debit ifrs-full:AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination
569 100660 - Disclosure - Expenses - Summary of Finance Income, Net (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureExpensesSummaryOfFinanceIncomeNetDetails
570 Implied Table Table

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 implied:Table
571 Expense By Nature [Abstract] Abstract ifrs-full:ExpenseByNatureAbstract
572 Gain on revaluation of warrant liabilities Concept (Monetary) For Period Credit alo:GainLossOnRevaluationOfWarrantLiabilities
573 Accretion of provision for site reclamation and closure and other provisions Concept (Monetary) For Period Debit alo:AccretionOfProvisionForSiteReclamationAndClosureAndOtherProvisions
574 Interest on credit facility Concept (Monetary) For Period Debit alo:InterestOnCreditFacility
575 Interest on equipment loan payables and equipment financing Concept (Monetary) For Period Debit alo:InterestOnEquipmentLoanPayablesAndEquipmentFinancing
576 Interest on other financial liability Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnOtherFinancialLiabilities
577 Other financial liability settlement gain Concept (Monetary) For Period Debit alo:OtherFinancialLiabilitySettlementGainLoss
578 Offering expense Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
579 Finance income, net Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
580 100670 - Disclosure - Trade and Other Receivables - Summary of Detailed Information about Trade and Other Receivables (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureTradeAndOtherReceivablesSummaryOfDetailedInformationAboutTradeAndOtherReceivablesDetails
581 Implied Table Table

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 implied:Table
582 Trade And Other Current Receivables [Abstract] Abstract ifrs-full:TradeAndOtherCurrentReceivablesAbstract
583 Trade receivable Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
584 VAT receivable Concept (Monetary) As Of Debit ifrs-full:CurrentValueAddedTaxReceivables
585 Income tax refund receivable Concept (Monetary) As Of Debit alo:CurrentIncomeTaxRefundReceivable
586 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
587 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
588 100680 - Disclosure - Trade and Other Receivables - Summary of Detailed Information about Trade and Other Receivables (Parenthetical) (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureTradeAndOtherReceivablesSummaryOfDetailedInformationAboutTradeAndOtherReceivablesParentheticalDetails
589 Disclosure Of Trade And Other Current Receivables [Table] Table

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 alo:DisclosureOfTradeAndOtherCurrentReceivablesTable
590 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
591 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
592 Subsequent [Member] Member alo:EventsAfterReportingPeriodMember
593 Disclosure Of Trade And Other Current Receivables [Line Items] LineItems alo:DisclosureOfTradeAndOtherCurrentReceivablesLineItems
594 Income tax instalments applied against VAT receivable Concept (Monetary) For Period Debit alo:IncomeTaxInstallmentsAppliedAgainstVATReceivable
595 Value added tax collected Concept (Monetary) For Period Debit alo:CashReceiptsFromCollectionOfValueAddedTaxReceivable
596 100690 - Disclosure - Inventories - Summary of Inventories (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureInventoriesSummaryOfInventoriesDetails
597 Implied Table Table

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 implied:Table
598 Disclosure Of Inventories [Abstract] Abstract alo:DisclosureOfInventoriesAbstract
599 Stockpile Concept (Monetary) As Of Debit ifrs-full:CurrentOreStockpiles
600 Ore in process Concept (Monetary) As Of Debit ifrs-full:WorkInProgress
601 Finished metal inventory Concept (Monetary) As Of Debit ifrs-full:FinishedGoods
602 Supplies Concept (Monetary) As Of Debit ifrs-full:ProductionSupplies
603 Total inventories Concept (Monetary) As Of Debit ifrs-full:InventoriesTotal
604 Less: non-current ore in process Concept (Monetary) As Of Debit ifrs-full:NoncurrentOreStockpiles
605 Current portion Concept (Monetary) As Of Debit ifrs-full:Inventories
606 100710 - Disclosure - Inventories - Additional Information (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureInventoriesAdditionalInformationDetails
607 Implied Table Table

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608 Disclosure Of Inventories [Abstract] Abstract alo:DisclosureOfInventoriesAbstract
609 Inventories recognized as expense Concept (Monetary) For Period Debit ifrs-full:CostOfInventoriesRecognisedAsExpenseDuringPeriod
610 100720 - Disclosure - Mineral Properties, Plant and Equipment, Exploration and Evaluation - Schedule of Mineral Properties Plant and Equipment Exploration and Evaluation (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureMineralPropertiesPlantAndEquipmentExplorationAndEvaluationScheduleOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationDetails
611 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Table] Table

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 alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationTable
612 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
613 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
614 Mineral Properties Member alo:MineralPropertiesMember
615 Plant and Equipment Member alo:PlantAndEquipmentMember
616 Exploration and Evaluation Member ifrs-full:TangibleExplorationAndEvaluationAssetsMember
617 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
618 Carrying amount [member] Member ifrs-full:CarryingAmountMember
619 Cost Member ifrs-full:GrossCarryingAmountMember
620 Accumulated Depreciation, Depletion and Impairment Member ifrs-full:AccumulatedDepreciationAmortisationAndImpairmentMember
621 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
622 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
623 Acquisition of Rye Patch [member] Member alo:AcquisitionOfRyePatchMember
624 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Line Items] LineItems alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationLineItems
625 Mineral properties plant and equipment exploration and evaluation Concept (Monetary) As Of Debit alo:MineralPropertiesPlantAndEquipmentExplorationAndEvaluation
626 Expenditures Concept (Monetary) For Period Debit alo:ExpendituresOnMineralPropertiesPlantAndEquipmentExplorationAndEvaluation
627 Rye Patch acquisition Concept (Monetary) For Period Debit alo:AcquisitionRelatedCost
628 Change in reclamation obligation Concept (Monetary) For Period Credit alo:ChangeInReclamationObligation
629 Mineral properties plant and equipment exploration and evaluation Concept (Monetary) As Of Debit alo:MineralPropertiesPlantAndEquipmentExplorationAndEvaluation
630 Depreciation and depletion Concept (Monetary) For Period Debit alo:DepreciationAndDepletion
631 Impairment of exploration and evaluation Concept (Monetary) For Period Debit alo:ImpairmentOfExplorationAndEvaluationAsset
632 100730 - Disclosure - Mineral Properties, Plant and Equipment, Exploration and Evaluation - Schedule of Mineral Properties Plant and Equipment Exploration and Evaluation (Parenthetical) (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureMineralPropertiesPlantAndEquipmentExplorationAndEvaluationScheduleOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationParentheticalDetails
633 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Table] Table

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 alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationTable
634 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
635 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
636 Mineral Properties Member alo:MineralPropertiesMember
637 Plant and Equipment Member alo:PlantAndEquipmentMember
638 Segments [axis] Axis ifrs-full:SegmentsAxis
639 Segments [member] Member ifrs-full:SegmentsMember
640 Florida Canyon Mine [member] Member alo:FloridaCanyonMineMember
641 Statement Geographical Axis us-gaap:StatementGeographicalAxis
642 Segment Geographical Member us-gaap:SegmentGeographicalDomain
643 El Sauzal [member] Member alo:ElSauzalMember
644 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Line Items] LineItems alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationLineItems
645 Deferred stripping costs Concept (Monetary) As Of Debit alo:DeferredStrippingCosts
646 Construction-in-progress assets Concept (Monetary) As Of Debit ifrs-full:ConstructionInProgress
647 Provision for site reclamation and closure Concept (Monetary) As Of Credit ifrs-full:RestructuringProvision
648 Risk free interest rate Concept (Percent) For Period alo:RestructuringRiskFreeDiscountRate
649 Carrying value of plant Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipmentCarryingAmountAtCostOfRevaluedAssets
650 Fair value of plant Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
651 Impairment loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
652 100740 - Disclosure - Mineral Properties, Plant and Equipment, Exploration and Evaluation - Schedule of Carrying Amount by Segment (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureMineralPropertiesPlantAndEquipmentExplorationAndEvaluationScheduleOfCarryingAmountBySegmentDetails
653 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Table] Table

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 alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationTable
654 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
655 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
656 Mineral Properties Member alo:MineralPropertiesMember
657 Plant and Equipment Member alo:PlantAndEquipmentMember
658 Exploration and Evaluation Member ifrs-full:TangibleExplorationAndEvaluationAssetsMember
659 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
660 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
661 Other Member ifrs-full:UnallocatedAmountsMember
662 Segments [axis] Axis ifrs-full:SegmentsAxis
663 Segments [member] Member ifrs-full:SegmentsMember
664 San Francisco Mine Member alo:SanFranciscoMineMember
665 Florida Canyon Mine [member] Member alo:FloridaCanyonMineMember
666 Ana Paula Project Member alo:AnaPaulaProjectMember
667 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Line Items] LineItems alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationLineItems
668 Mineral properties, plant and equipment, exploration and evaluation Concept (Monetary) As Of Debit alo:MineralPropertiesPlantAndEquipmentExplorationAndEvaluation
669 100750 - Disclosure - Mineral Properties, Plant and Equipment, Exploration and Evaluation - Additional Information (Details) Network

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670 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Table] Table

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 alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationTable
671 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
672 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
673 Able & York International Corporation, LLC [Member] Member alo:AbleAndYorkInternationalCorporationLLCMember
674 Maverix Metals Inc [Member] Member alo:MaverixMetalsIncMember
675 Segments [axis] Axis ifrs-full:SegmentsAxis
676 Segments [member] Member ifrs-full:SegmentsMember
677 Florida Canyon Mine [member] Member alo:FloridaCanyonMineMember
678 Disclosure Of Mineral Properties Plant And Equipment Exploration And Evaluation [Line Items] LineItems alo:DisclosureOfMineralPropertiesPlantAndEquipmentExplorationAndEvaluationLineItems
679 Number of royalty payable to third parties Concept (Integer) For Period alo:NumberOfRoyaltyPayableToThirdParties
680 Percentage of net smelter royalty payable Concept (Percent) For Period alo:PercentageOfNetSmelterRoyalty
681 100760 - Disclosure - Reclamation Bond - Additional Information (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureReclamationBondAdditionalInformationDetails
682 Disclosure Of Financial Instruments [Table] Table

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 ifrs-full:DisclosureOfFinancialInstrumentsTable
683 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
684 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
685 Rye Patch [member] Member alo:RyePatchMember
686 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
687 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
688 Cash and cash equivalents [Member] Member alo:CashAndCashEquivalentMember
689 Equity investments [member] Member ifrs-full:EquityInvestmentsMember
690 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
691 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
692 Fixed interest rate [member] Member ifrs-full:FixedInterestRateMember
693 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
694 Reclamation bonds Concept (Monetary) As Of Debit alo:ReclamationBonds
695 Percentage value of collateral to acquired reclamation bonds Concept (Percent) For Period alo:PercentageValueOfCollateralToAcquiredReclamationBonds
696 Reduction in reclamation bonds Concept (Monetary) As Of Debit alo:ReductionInReclamationBonds
697 Investments In Fund Concept (Monetary) As Of Debit alo:InvestmentsInFund
698 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
699 Gain Loss On Fund Concept (Monetary) For Period Credit alo:GainLossOnFund
700 100770 - Disclosure - Trade Payables and Accrued Liabilities - Summary of Trade Payables and Accrued Liabilities (Details) Network

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701 Implied Table Table

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702 Trade And Other Payables [Abstract] Abstract ifrs-full:TradeAndOtherPayablesAbstract
703 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
704 Income taxes payable Concept (Monetary) As Of Credit alo:IncomeTaxPayable
705 Accrued liabilities Concept (Monetary) As Of Credit ifrs-full:Accruals
706 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
707 Vendor loan Concept (Monetary) As Of Credit ifrs-full:LoansReceived
708 Trade payables and accrued liabilities Concept (Monetary) As Of Credit alo:TradePayablesAndAccruedLiabilitiesCurrent
709 100780 - Disclosure - Credit Facility - Additional Information (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureCreditFacilityAdditionalInformationDetails
710 Disclosure Of Credit Facility [Table] Table

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 alo:DisclosureOfCreditFacilityTable
711 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
712 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
713 Credit Facility Member alo:CreditFacilityMember
714 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
715 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
716 Rye Patch [member] Member alo:RyePatchMember
717 Disclosure Of Credit Facility [Line Items] LineItems alo:DisclosureOfCreditFacilityLineItems
718 Borrowings outstanding Concept (Monetary) As Of Credit ifrs-full:Borrowings
719 Credit facility Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesRecognisedAsOfAcquisitionDate
720 Credit facility accrued interest percent Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
721 Repayment amount of credit facility Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
722 Interest expense Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnBorrowings
723 100790 - Disclosure - Equipment Loans Payable - Additional Information (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureEquipmentLoansPayableAdditionalInformationDetails
724 Disclosure Of Equipment Loan Payable [Table] Table

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*

 alo:DisclosureOfEquipmentLoanPayableTable
725 Capital requirements [axis] Axis ifrs-full:CapitalRequirementsAxis
726 Capital requirements [member] Member ifrs-full:CapitalRequirementsMember
727 Haul Trucks Financing Member alo:HaulTrucksFinancingMember
728 Equipment Financing Member alo:EquipmentFinancingMember
729 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
730 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
731 Rye Patch [member] Member alo:RyePatchMember
732 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
733 Counterparties [member] Member ifrs-full:CounterpartiesMember
734 Caterpillar Financial Services Corporation Member alo:CaterpillarFinancialServicesCorporationMember
735 Disclosure Of Equipment Loan Payable [Line Items] LineItems alo:DisclosureOfEquipmentLoanPayableLineItems
736 Equipment loan payable Concept (Monetary) As Of Credit alo:EquipmentLoanPayables
737 Number of haul trucks acquired Concept (Integer) For Period alo:NumberOfHaulTrucksAcquired
738 Loan remaining term Concept (xbrli:durationItemType) For Period alo:LoanRemainingPayabelTerm
739 Credit facility accrued interest percent Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
740 Monthly instalments Concept (Monetary) For Period Credit alo:LoanFinancingMonthlyInstallment
741 Equipment loan obtained Concept (Monetary) As Of Credit ifrs-full:LoansReceived
742 Loan period Concept (xbrli:durationItemType) For Period alo:LoanPeriod
743 Maturity date Concept (Date) For Period alo:LoanMaturityDate
744 Number of quarterly instalments Concept (Integer) For Period alo:NumberOfQuarterlyInstalments
745 Payment of loan fee Concept (Monetary) For Period Credit alo:PaymentsOfLoanFee
746 Current portion of loans payable Concept (Monetary) As Of Credit ifrs-full:CurrentLoansReceivedAndCurrentPortionOfNoncurrentLoansReceived
747 Non-current portion of loans payable Concept (Monetary) As Of Credit ifrs-full:NoncurrentPortionOfNoncurrentLoansReceived
748 100800 - Disclosure - Equipment Loans Payable - Summary of Equipment Loan Payable (Details) Network

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749 Disclosure Of Equipment Loan Payable [Table] Table

*

*

 alo:DisclosureOfEquipmentLoanPayableTable
750 Capital requirements [axis] Axis ifrs-full:CapitalRequirementsAxis
751 Capital requirements [member] Member ifrs-full:CapitalRequirementsMember
752 Haul Trucks Financing Member alo:HaulTrucksFinancingMember
753 Disclosure Of Equipment Loan Payable [Line Items] LineItems alo:DisclosureOfEquipmentLoanPayableLineItems
754 Balance, Closing Date Concept (Monetary) As Of Credit alo:EquipmentLoanPayables
755 Interest Concept (Monetary) As Of Credit alo:InterestOnLoanFinancing
756 Payments - principal and interest Concept (Monetary) For Period Credit alo:PaymentsOfPrincipalAndInterest
757 Equipment loan payable, net Concept (Monetary) As Of Credit ifrs-full:Borrowings
758 Non-current portion of loans payable Concept (Monetary) As Of Credit ifrs-full:LongtermBorrowings
759 Current portion of loans payable Concept (Monetary) As Of Credit ifrs-full:ShorttermBorrowings
760 100810 - Disclosure - Warrant Liability - Schedule of Warrants (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureWarrantLiabilityScheduleOfWarrantsDetails
761 Disclosure Of Classes Of Share Capital [Table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
762 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
763 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
764 Bought deal July 20, 2017 Member alo:WarrantsBoughtOnTwentyJulyTwentySeventeenMember
765 Bought deal November 30, 2016 Member alo:WarrantsBoughtOnThirtyNovemberTwentySixteenMember
766 Warrant Issued, Expiry at July 28, 2018 Member alo:WarrantIssuedWithExpiryOnJulyTwentyEightTwentyEighteenMember
767 Warrant Issued, Expiry at December 29, 2018 Member alo:WarrantIssuedWithExpiryOnDecemberTwentyNineTwentyEighteenMember
768 Warrant Issued, Expiry at January 31, 2020 One Member alo:WarrantIssuedWithExpiryOnJanuary312020OneMember
769 Warrant Issued, Expiry at January 31, 2020 Two Member alo:WarrantIssuedWithExpiryOnJanuary312020TwoMember
770 Warrant Issued, Expiry at July 28, 2021 Member alo:WarrantIssuedWithExpiryOnJulyTwentyEightTwentyTwentyOneMember
771 Disclosure Of Classes Of Share Capital [Line Items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
772 Expiry Date Concept (Date) For Period alo:WarrantsExpiryDate
773 TSX Ticker Concept (Text/String) For Period alo:TickerSymbolOfWarrants
774 Exercise Price of Warrants Concept (Share) For Period alo:ExercisePriceOfWarrants
775 Warrants Issued Concept (Shares) As Of alo:WarrantsIssued
776 Common Shares Upon Exercise Concept (Shares) As Of alo:CommonSharesIssuableUponExerciseOfWarrants
777 Warrants Outstanding Concept (Shares) As Of alo:WarrantsOutstanding
778 100820 - Disclosure - Warrant Liability - Summary of Revaluation of Share Purchase Warrants (Details) Network

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779 Disclosure Of Classes Of Share Capital [Table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
780 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
781 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
782 Bought deal July 20, 2017 Member alo:WarrantsBoughtOnTwentyJulyTwentySeventeenMember
783 Bought deal November 30, 2016 Member alo:WarrantsBoughtOnThirtyNovemberTwentySixteenMember
784 Warrants Issued through Rye Patch Acquisition Member alo:WarrantsIssuedThroughRyePatchAcquisitionMember
785 Disclosure Of Classes Of Share Capital [Line Items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
786 Share purchase warrants revalued amount Concept (Monetary) For Period Credit alo:SharePurchaseWarrantsRevaluedAmount
787 100830 - Disclosure - Warrant Liability - Summary of Revaluation of Share Purchase Warrants (Parenthetical) (Details) Network

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788 Disclosure Of Classes Of Share Capital [Table] Table

*

*

 ifrs-full:DisclosureOfClassesOfShareCapitalTable
789 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
790 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
791 Warrants Issued through Rye Patch Acquisition Member alo:WarrantsIssuedThroughRyePatchAcquisitionMember
792 Range [axis] Axis ifrs-full:RangeAxis
793 Ranges [member] Member ifrs-full:RangesMember
794 Bottom of Range Member ifrs-full:BottomOfRangeMember
795 Top of Range Member ifrs-full:TopOfRangeMember
796 Disclosure Of Classes Of Share Capital [Line Items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
797 Risk-free interest rate Concept (Percent) For Period alo:RiskFreeInterestRateOfWarrants
798 Expected life of warrants Concept (xbrli:durationItemType) For Period alo:ExpectedLifeOfWarrants
799 Annualized volatility Concept (Percent) For Period alo:AnnualizedVolatilityOfWarrants
800 Dividend rate Concept (Percent) For Period alo:DividendRateOfWarrants
801 100840 - Disclosure - Warrant Liability - Schedule of (Gain) Loss on Revaluation of Share Purchase Warrant Liabilities (Details) Network

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802 Disclosure Of Classes Of Share Capital [Table] Table

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803 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
804 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
805 Bought deal July 20, 2017 Member alo:WarrantsBoughtOnTwentyJulyTwentySeventeenMember
806 Bought deal November 30, 2016 Member alo:WarrantsBoughtOnThirtyNovemberTwentySixteenMember
807 Private Placement October 19, 2015 Member alo:WarrantsIssuedAtPrivatePlacementOnNineteenOctoberTwentyFifteenMember
808 Warrants Issued through Rye Patch Acquisition Member alo:WarrantsIssuedThroughRyePatchAcquisitionMember
809 Disclosure Of Classes Of Share Capital [Line Items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
810 Gain on revaluation of warrant liabilities Concept (Monetary) For Period Credit alo:GainLossOnRevaluationOfWarrantLiabilities
811 100850 - Disclosure - Other Financial Liability - Additional Information (Details) Network

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812 Disclosure Of Financial Liabilities [Table] Table

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813 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
814 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
815 Rye Patch [member] Member alo:RyePatchMember
816 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
817 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
818 A D M Parties Member alo:ADMPartiesMember
819 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
820 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
821 Promissory Note Member alo:PromissoryNoteMember
822 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
823 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
824 A D M Parties Member alo:ADMPartiesMember
825 Share Purchase Warrants Member alo:SharePurchaseWarrantsMember
826 Types of interest rates [axis] Axis ifrs-full:TypesOfInterestRatesAxis
827 Interest rate types [member] Member ifrs-full:InterestRateTypesMember
828 Until First Anniversary Member alo:FirstAnniversaryMember
829 After First Anniversary Member alo:AfterFirstAnniversaryMember
830 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
831 Obligation with regard to business acquisition Concept (Monetary) As Of Credit ifrs-full:LiabilitiesIncurred
832 Cash obligation with regard to business acquisition Concept (Monetary) As Of Credit ifrs-full:ContingentLiabilitiesRecognisedInBusinessCombination
833 Cash payment obligation with regard to business acquisition Concept (Monetary) For Period Credit ifrs-full:NewLiabilitiesContingentLiabilitiesRecognisedInBusinessCombination
834 Shares issuance with regard to business acquisition Concept (Monetary) For Period Credit alo:SharesIssuanceWithRegardToBusinessAcquisition
835 Interest rate of cash obligation with regard to business combination for first year Concept (Percent) For Period alo:InterestRateOfCashObligationWithRegardToBusinessCombinationForFirstYear
836 Interest rate of cash obligation with regard to business combination thereafter first year Concept (Percent) For Period alo:InterestRateOfCashObligationWithRegardToBusinessCombinationThereafterFirstYear
837 Nature of obligation Concept (Text/String) For Period ifrs-full:DescriptionOfNatureOfObligationContingentLiabilitiesInBusinessCombination
838 Fair value of other financial liability Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
839 Shares issued to settle other financial liability, shares Concept (Shares) For Period alo:NumberOfCommonSharesIssuedToSettleOtherFinancialLiability
840 Common shares issued, per share Concept (Share) As Of ifrs-full:ParValuePerShare
841 Issued capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
842 Unsecured promissory note issued Concept (Monetary) As Of Credit ifrs-full:DebtSecurities
843 Payable period Concept (Text/String) For Period ifrs-full:BorrowingsMaturity
844 Credit facility accrued interest percent Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
845 Amortized cost Concept (Monetary) For Period Debit alo:DebtSecuritiesAmortizedCost
846 Warrants Issued Concept (Shares) As Of alo:WarrantsIssued
847 Number of common shares Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
848 Strike price Concept (Share) For Period alo:WarrantsStrikePrice
849 Expiry Date Concept (Date) For Period alo:WarrantsExpiryDate
850 Warrants Outstanding Concept (Shares) As Of alo:WarrantsOutstanding
851 Weighted average grant date fair value Concept (Monetary) As Of Credit ifrs-full:WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted
852 Gain on settlement of other financial liabilities Concept (Monetary) For Period Credit alo:GainOnSettlementOfOtherFinancialLiabilities
853 Interest accrued expense on note Concept (Monetary) As Of Credit alo:InterestAccruedOnNote
854 100860 - Disclosure - Provision for Site Reclamation and Closure - Summary of Detailed Information about Provision for Site Reclamation and Closure (Details) Network

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855 Implied Table Table

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856 Disclosure Of Provision For Site Reclamation And Closure [Abstract] Abstract alo:DisclosureOfProvisionForSiteReclamationAndClosureAbstract
857 Beginning balance Concept (Monetary) As Of Credit alo:ProvisionForSiteReclamationAndClosure
858 Addition of Florida Canyon Mine at the Closing Date Concept (Monetary) For Period Credit alo:AdditionToSiteReclamationAndClosure
859 Accretion of discounted cash flows Concept (Monetary) For Period Credit alo:AccretionOfDiscountedCashFlows
860 Change in estimated cash flows and assumptions Concept (Monetary) For Period Credit alo:IncreaseDecreaseInEstimatedCashFlowsAndAssumptions
861 Ending balance Concept (Monetary) As Of Credit alo:ProvisionForSiteReclamationAndClosure
862 100870 - Disclosure - Provision for Site Reclamation and Closure - Additional Information (Details) Network

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863 Disclosure Of Provision For Site Reclamation And Closure [Table] Table

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 alo:DisclosureOfProvisionForSiteReclamationAndClosureTable
864 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
865 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
866 Rye Patch Member alo:RyePatchMember
867 Measurement [axis] Axis ifrs-full:MeasurementAxis
868 Aggregated measurement [member] Member ifrs-full:AggregatedMeasurementMember
869 Annual Reassessment Member alo:AnnualReassessmentMember
870 Segments [axis] Axis ifrs-full:SegmentsAxis
871 Segments [member] Member ifrs-full:SegmentsMember
872 San Francisco Mine Member alo:SanFranciscoMineMember
873 Florida Canyon Mine Member alo:FloridaCanyonMineMember
874 Disclosure Of Provision For Site Reclamation And Closure [Line Items] LineItems alo:DisclosureOfProvisionForSiteReclamationAndClosureLineItems
875 Increase (decrease) in provisions Concept (Monetary) For Period Credit alo:IncreaseDecreaseInEstimatedCashFlowsAndAssumptions
876 Risk free discount rate Concept (Percent) For Period alo:EstimatedCashFlowsRiskFreeDiscountRate
877 Total undiscounted amount of estimated cash flows requited to settle retirement obligation Concept (Monetary) For Period Credit alo:NetUndiscountedAmountOfEstimatedCashFlowsRequitedToSettleRetirementObligationOfRestructuringProvision
878 Weighted average inflation rate of cash flows Concept (Percent) As Of alo:WeightedAverageInflationRateOfCashFlows
879 Weighted average pre-tax risk-free rate used to discount cash flows Concept (Percent) As Of alo:WeightedAveragePreTaxRiskFreeRateUsedToDiscountCashFlows
880 100880 - Disclosure - Equity - Additional Information (Details) Network

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881 Disclosure Of Classes Of Share Capital [Table] Table

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 ifrs-full:DisclosureOfClassesOfShareCapitalTable
882 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
883 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
884 Rye Patch [member] Member alo:RyePatchMember
885 Capital requirements [axis] Axis ifrs-full:CapitalRequirementsAxis
886 Capital requirements [member] Member ifrs-full:CapitalRequirementsMember
887 Bought Deal Financing Member alo:BoughtDealFinancingMember
888 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
889 Equity [member] Member ifrs-full:EquityMember
890 Private Placement Member alo:PrivatePlacementsMember
891 Common Shares [Member] Member alo:CommonSharesMember
892 Range [axis] Axis ifrs-full:RangeAxis
893 Ranges [member] Member ifrs-full:RangesMember
894 Maximum [Member] Member ifrs-full:TopOfRangeMember
895 Minimum [Member] Member ifrs-full:BottomOfRangeMember
896 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
897 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
898 Deferred Share Units Member alo:DeferredShareUnitsMember
899 Restricted Share Units Member alo:RestrictedShareUnitsMember
900 Performance Share Units Member alo:PerformanceShareUnitsMember
901 Disclosure Of Classes Of Share Capital [Line Items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
902 Number of shares of common stock issued for acquisition Concept (Decimal) As Of ifrs-full:NumberOfInstrumentsOrInterestsIssuedOrIssuable
903 Common stock issued during period, value, acquisition Concept (Monetary) As Of Credit ifrs-full:EquityInterestsOfAcquirer
904 Transactions costs related to share issuance Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
905 Number of common shares issued upon exercise of share options Concept (Shares) For Period alo:CommonStockIssuedDuringPeriodSharesToSettleOtherFinancialLiability
906 Value of common shares issued upon exercise of share options Concept (Monetary) For Period Credit alo:CommonStockIssuedDuringPeriodValueToSettleOtherFinancialLiability
907 Common stock shares issued in financing Concept (Shares) For Period alo:NumberSharesOfCommonStockIssuedDuringPeriodForEquityFinancing
908 Proceeds from issue of common shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
909 Stock issuance transaction costs Concept (Monetary) For Period Debit alo:StockIssuanceTransactionCosts
910 Number of shares of common stock issued during period, warrants exercised Concept (Shares) For Period alo:NumberOfSharesOfCommonStockIssuedDuringPeriodWarrantsExercised
911 Common stock issued during period, value, warrants exercised Concept (Monetary) For Period Credit alo:CommonStockIssuedDuringPeriodValueWarrantsExercised
912 Number of common shares issued upon exercise of share options Concept (Shares) For Period alo:CommonStockIssuedDuringPeriodSharesStockOptionExercised
913 Value of common shares issued upon exercise of share options Concept (Monetary) For Period Credit alo:IncreaseInIssuedCapitalDueToExerciseOfOptions
914 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
915 Number of shares outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
916 Percentage of share options allowed to be granted as percentage of number of issued shares Concept (Percent) For Period alo:PercentageOfShareOptionsAllowedToBeGrantedAsPercentageOfNumberOfIssuedShares
917 share options granted, term Concept (xbrli:durationItemType) For Period alo:ShareOptionsGrantedTerm
918 Share options vesting period Concept (xbrli:durationItemType) For Period alo:ShareOptionsVestingPeriod
919 Fair value of share options recognized as expense Concept (Monetary) For Period Debit alo:FairValueOfShareOptionsRecognizedAsExpense
920 Weighted average grant date fair value of options granted Concept (Monetary) As Of Credit ifrs-full:WeightedAverageFairValueAtMeasurementDateShareOptionsGranted
921 Share based payment arrangement other equity instruments conversion ratio Concept (Shares) As Of alo:SharebasedPaymentArrangementOtherEquityInstrumentsConversionRatioInShares
922 Shares outstanding included in liabilities Concept (Monetary) As Of Credit ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011
923 Share-based payments expense Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
924 Share based payment arrangement vesting period Concept (xbrli:durationItemType) For Period alo:SharebasedPaymentArrangementVestingPeriod
925 Share based payment arrangement other equity instruments vesting date Concept (Date) For Period alo:ShareBasedPaymentArrangementOtherEquityInstrumentsVestingDate
926 100890 - Disclosure - Equity - Summary of Share Option Transactions and Number of Share Options Outstanding (Details) Network

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927 Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Table] Table

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 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
928 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
929 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
930 Rye Patch [member] Member alo:RyePatchMember
931 Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
932 Number of share options outstanding, Beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
933 Number of share options, Granted Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
934 Number of share options, Exercised Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
935 Number of share options, Expired Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement
936 Number of share options, Forfeited Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
937 Number of share options outstanding, Ending balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
938 Number of share options, Exercisable Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
939 Weighted average exercise price outstanding, Beginning balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
940 Weighted average exercise price, Granted Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
941 Weighted average exercise price, Exercised Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
942 Weighted average exercise price, Expired Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement
943 Weighted average exercise price, Forfeited Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
944 Weighted average exercise price outstanding, Ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
945 Weighted average exercise price, Exercisable Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
946 100900 - Disclosure - Equity - Schedule of Share Options Outstanding and Exercisable (Details) Network

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947 Disclosure Of Range Of Exercise Prices Of Outstanding Share Options [Table] Table

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 ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsTable
948 Ranges of exercise prices for outstanding share options [axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
949 Ranges of exercise prices for outstanding share options [member] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
950 1.00 - 10.00 Member alo:ExercisePriceRangeOneMember
951 10.01 - 20.00 Member alo:ExercisePriceRangeTwoMember
952 20.01 - 31.40 Member alo:ExercisePriceRangeThreeMember
953 Range [axis] Axis ifrs-full:RangeAxis
954 Ranges [member] Member ifrs-full:RangesMember
955 Minimum [Member] Member ifrs-full:BottomOfRangeMember
956 Maximum [Member] Member ifrs-full:TopOfRangeMember
957 Disclosure Of Range Of Exercise Prices Of Outstanding Share Options [Line Items] LineItems ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems
958 Exercise price of outstanding share options Concept (Monetary) As Of ifrs-full:ExercisePriceOfOutstandingShareOptions
959 Number of options outstanding Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
960 Weighted average exercise price, options outstanding Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
961 Weighted average remaining life of options (years), outstanding Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
962 Number of options exercisable Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
963 Weighted average exercise price, options exercisable Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
964 Weighted average remaining life of options (years), exercisable Concept (xbrli:durationItemType) For Period alo:WeightedAverageRemainingContractualLifeOfShareOptionsExercisable
965 100910 - Disclosure - Equity - Summary of Weighted Average Assumptions Used for Valuation of Share Options Granted (Details) Network

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966 Implied Table Table

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967 Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Abstract] Abstract ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
968 Risk-free interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
969 Expected life of options Concept (Decimal) For Period ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
970 Annualized volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
971 Forfeiture rate Concept (Percent) For Period alo:ExpectedForfeitureRateOfOptionsGranted
972 Dividend rate Concept (Percent) For Period ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
973 100920 - Disclosure - Equity - Schedule of Grants of Deferred Share Units, Restricted Share Units and Performance Share Units under Long-Term Incentive Plan (Details) Network

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974 Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Table] Table

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975 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
976 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
977 Deferred Share Units Member alo:DeferredShareUnitsMember
978 Restricted Share Units Member alo:RestrictedShareUnitsMember
979 Performance Share Units Member alo:PerformanceShareUnitsMember
980 Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
981 Beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
982 Granted Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
983 Forfeited Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
984 Ending balance Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
985 Beginning balance, Fair Value Concept (Monetary) As Of Credit alo:WeightedAverageFairValueOfOtherEquityInstrumentsOutstanding
986 Granted, Fair Value Concept (Monetary) For Period Credit alo:WeightedAverageFairValueOfOtherEquityInstrumentsGranted
987 Forfeited,Fair Value Concept (Monetary) For Period Credit alo:WeightedAverageFairValueOfOtherEquityInstrumentsForfeited
988 Change in value, Fair Value Concept (Monetary) For Period Credit alo:GainLossOnValuationOfOtherEquityInstruments
989 Ending balance, Fair Value Concept (Monetary) As Of Credit alo:WeightedAverageFairValueOfOtherEquityInstrumentsOutstanding
990 100930 - Disclosure - Income Taxes - Schedule of Reconciliation of Income Taxes (Details) Network

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991 Implied Table Table

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992 Disclosure Of Income Taxes [Abstract] Abstract alo:DisclosureOfIncomeTaxesAbstract
993 (Loss) earnings before income taxes Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
994 Combined Canadian federal and provincial income tax rates Concept (Percent) For Period ifrs-full:ApplicableTaxRate
995 Expected income tax (recovery) expense Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
996 Items that cause an increase (decrease): Abstract alo:ItemsThatCauseIncreaseDecreaseInIncomeTaxesAbstract
997 Effect of different tax rates in foreign jurisdiction Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfForeignTaxRates
998 Non-deductible expenses and Mexico inflation adjustments Concept (Monetary) For Period Debit alo:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLossAndInflationAdjustment
999 Foreign exchange Concept (Monetary) For Period Debit alo:TaxEffectOfForeignExchange
1000 Change in prior year estimates Concept (Monetary) For Period Debit alo:TaxEffectsOfChangeInPriorYearEstimates
1001 Mexican special mining duty Concept (Monetary) For Period Debit alo:TaxEffectOfSpecialMiningDuty
1002 Withholding taxes Concept (Monetary) For Period Debit alo:TaxEffectOfWithholdingTaxes
1003 Change in unrecognized deferred income tax assets Concept (Monetary) For Period Debit alo:TaxEffectOfChangeInUnrecognizedDeferredIncomeTaxAssets
1004 Other Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
1005 Income tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
1006 100940 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets And Liabilities (Details) Network

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1007 Disclosure Of Income Taxes [Table] Table

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 alo:DisclosureOfIncomeTaxesTable
1008 Temporary difference, unused tax losses and unused tax credits [axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1009 Temporary difference, unused tax losses and unused tax credits [member] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1010 Provision for Site Reclamation and Closure Member alo:ProvisionForSiteReclamationAndClosureMember
1011 Non-capital Losses Member ifrs-full:UnusedTaxLossesMember
1012 Mineral Properties, Plant and Equipment, Exploration and Evaluation Member alo:MineralPropertiesPlantAndEquipmentExplorationAndEvaluationMember
1013 Other Member ifrs-full:OtherTemporaryDifferencesMember
1014 Mexican Special Mining Duty Member alo:MexicanSpecialMiningDutyMember
1015 Disclosure Of Income Taxes [Line Items] LineItems alo:DisclosureOfIncomeTaxesLineItems
1016 Deferred tax assets: Abstract alo:DeferredIncomeTaxAssetsAbstract
1017 Deferred tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1018 Deferred tax liabilities: Abstract alo:DeferredIncomeTaxLiabilitiesAbstract
1019 Deferred tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
1020 Deferred tax liabilities, net Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1021 Deferred tax liability, opening Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1022 Acquisition of mines Concept (Monetary) For Period Credit ifrs-full:PurchaseOfMiningAssets
1023 Deferred tax (recovery) expense charged to earnings during the year Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
1024 Other Concept (Monetary) For Period Debit alo:DeferredTaxExpenseOther
1025 Deferred tax liability, closing Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
1026 100950 - Disclosure - Income Taxes - Schedule of Unrecognized Tax Losses, Deductible Temporary Differences, and Tax Credits (Details) Network

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1027 Implied Table Table

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1028 Disclosure Of Unrecognized Tax Losses Deductible Temporary Differences And Tax Credits [Abstract] Abstract alo:DisclosureOfUnrecognizedTaxLossesDeductibleTemporaryDifferencesAndTaxCreditsAbstract
1029 Non-capital losses Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1030 Mineral properties, plant and equipment, exploration and evaluation Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1031 Share issuance costs Concept (Monetary) As Of ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
1032 Unrecognized tax losses, deductible temporary differences, and tax credits Concept (Monetary) As Of Debit alo:UnrecognizedTaxLossesDeductibleTemporaryDifferencesAndTaxCredits
1033 100960 - Disclosure - Income Taxes - Additional Information (Details) Network

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1034 Disclosure Of Income Taxes [Table] Table

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 alo:DisclosureOfIncomeTaxesTable
1035 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1036 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1037 Canada Member country:CA
1038 US Member country:US
1039 Mexico Member country:MX
1040 Disclosure Of Income Taxes [Line Items] LineItems alo:DisclosureOfIncomeTaxesLineItems
1041 Unused tax losses Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1042 Description of expiry date of unused tax losses Concept (Text/String) For Period ifrs-full:DescriptionOfExpiryDateOfTemporaryDifferencesUnusedTaxLossesAndUnusedTaxCredits
1043 100970 - Disclosure - (Loss) Earnings Per Share - Summary of Earnings Per Share (Details) Network

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1044 Implied Table Table

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1045 Earnings Per Share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
1046 (Loss) earnings for the period basic and diluted EPS Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1047 Weighted average shares outstanding, Basic EPS Concept (Shares) For Period ifrs-full:WeightedAverageShares
1048 Effect of dilutive securities, Share options Concept (Shares) For Period ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
1049 Effect of dilutive securities, Warrants Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
1050 Weighted average shares outstanding, Diluted EPS Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
1051 Basic EPS Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
1052 Diluted EPS Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
1053 100980 - Disclosure - (Loss) Earnings Per Share - Additional Information (Details) Network

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1054 Earnings Per Share [Table] Table

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 ifrs-full:EarningsPerShareTable
1055 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
1056 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
1057 Share Purchase Warrants Member alo:SharePurchaseWarrantsMember
1058 Earnings Per Share [Line Items] LineItems ifrs-full:EarningsPerShareLineItems
1059 Number of options outstanding Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1060 Anti-dilutive share options Concept (Shares) For Period alo:AntiDilutiveShareOptions
1061 Number of shares outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1062 Anti-dilutive common shares outstanding Concept (Shares) For Period alo:AntiDilutiveOrdinarySharesOutstanding
1063 100990 - Disclosure - Supplemental Disclosure with Respect to Cash Flows - Additional Information (Details) Network

*

*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureSupplementalDisclosureWithRespectToCashFlowsAdditionalInformationDetails
1064 Implied Table Table

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*

 implied:Table
1065 Supplemental Disclosure With Respect To Cash Flows [Abstract] Abstract alo:SupplementalDisclosureWithRespectToCashFlowsAbstract
1066 Cash Concept (Monetary) As Of Debit ifrs-full:Cash
1067 Cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashEquivalents
1068 101000 - Disclosure - Supplemental Disclosure with Respect to Cash Flows - Schedule of Significant Non-cash Transactions (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureSupplementalDisclosureWithRespectToCashFlowsScheduleOfSignificantNonCashTransactionsDetails
1069 Implied Table Table

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 implied:Table
1070 Supplemental Disclosure With Respect To Cash Flows [Abstract] Abstract alo:SupplementalDisclosureWithRespectToCashFlowsAbstract
1071 Shares issued to settle other financial liability Concept (Monetary) For Period Credit alo:CommonSharesValueIssuedToSettleOtherFinancialLiability
1072 Fair value of Coeur shares received in disposal of property Concept (Monetary) For Period Credit alo:FairValueOfCoeurSharesReceivedInDisposalOfProperty
1073 Non cash transactions with respect to cash flows Concept (Monetary) For Period Credit alo:NonCashTransactionsWithRespectToCashFlows
1074 101010 - Disclosure - Financial Instruments and Risk Management - Additional Information (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureFinancialInstrumentsAndRiskManagementAdditionalInformationDetails
1075 Disclosure Of Financial Instruments [Table] Table

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*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1076 Continuing involvement in derecognised financial assets by type of instrument [axis] Axis ifrs-full:ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis
1077 Types of instrument [member] Member ifrs-full:TypesOfInstrumentMember
1078 Call Options [Member] Member ifrs-full:PurchasedCallOptionsMember
1079 Put Options [Member] Member ifrs-full:WrittenPutOptionsMember
1080 Levels of fair value hierarchy [axis] Axis ifrs-full:LevelsOfFairValueHierarchyAxis
1081 All levels of fair value hierarchy [member] Member ifrs-full:AllLevelsOfFairValueHierarchyMember
1082 Level 2 Member ifrs-full:Level2OfFairValueHierarchyMember
1083 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
1084 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
1085 Option contract [member] Member ifrs-full:OptionContractMember
1086 Forward Sales Contracts Member alo:ForwardSalesContractsMember
1087 Range [axis] Axis ifrs-full:RangeAxis
1088 Ranges [member] Member ifrs-full:RangesMember
1089 Maximum [Member] Member ifrs-full:TopOfRangeMember
1090 Minimum [Member] Member ifrs-full:BottomOfRangeMember
1091 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1092 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1093 Subsequent [Member] Member alo:EventsAfterReportingPeriodMember
1094 Business combinations [axis] Axis ifrs-full:BusinessCombinationsAxis
1095 Entity's total for business combinations [member] Member ifrs-full:EntitysTotalForBusinessCombinationsMember
1096 Rye Patch [member] Member alo:RyePatchMember
1097 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1098 Number of open option contracts settled Concept (Shares) For Period alo:NumberOfOpenOptionContractsSettled
1099 Gain (loss) on derivative contracts Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
1100 Fair value of the derivative asset Concept (Monetary) As Of Debit ifrs-full:CurrentDerivativeFinancialAssets
1101 Number of option contracts outstanding Concept (Integer) As Of alo:NumberOfOptionContractsOutstanding
1102 Total number of gold ounces placed Concept (Integer) For Period alo:NumberOfGoldOuncesPlaced
1103 Contracts with expiry dates Concept (Date) For Period alo:ContractsExpiryDate
1104 Weighted average floor price Concept (Decimal) For Period alo:WeightedAverageFloorPrice
1105 Weighted average sales price Concept (Decimal) For Period alo:WeightedAverageSalesPrice
1106 Number of open option contracts unsettled Concept (Integer) For Period alo:NumberOfOpenOptionContractsUnsettled
1107 Derivative liability Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
1108 Number Of Ounces Financially Settled Concept (Integer) For Period alo:NumberOfOuncesFinanciallySettled
1109 Gain Loss On Derivative Contracts Concept (Monetary) For Period Credit alo:RealizedGainOnSettledDerivativeContracts
1110 Number Of Ounces Delivered Concept (Integer) For Period alo:NumberOfOuncesDelivered
1111 Gain (Loss) On Derivative Contracts Delivered Concept (Monetary) For Period Credit alo:GainLossOnDerivativeContractsDelivered
1112 Number of gold ounce settled Concept (Integer) For Period alo:NumberOfGoldOunceSettled
1113 Percentage of change in foreign currencies assumption Concept (Percent) For Period alo:PercentageOfChangeInForeignCurrencyAssumption
1114 Increase (decrease) in earnings assuming change in foreign currencies Concept (Monetary) For Period Debit alo:ImpactOfChangeInForeignCurrencyOnEarnings
1115 Description of concentrations of risk Concept (Text/String) For Period ifrs-full:ConcentrationsOfRisk
1116 101020 - Disclosure - Financial Instruments and Risk Management - Summary of Net Monetary Assets and Liabilities Held in Foreign Currencies (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureFinancialInstrumentsAndRiskManagementSummaryOfNetMonetaryAssetsAndLiabilitiesHeldInForeignCurrenciesDetails
1117 Disclosure Of Financial Instruments [Table] Table

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*

 ifrs-full:DisclosureOfFinancialInstrumentsTable
1118 Currency Axis us-gaap:CurrencyAxis
1119 All Currencies Member currency:AllCurrenciesDomain
1120 Canadian Dollar Member currency:CAD
1121 Mexican Peso Member currency:MXN
1122 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1123 Net monetary assets (liabilities) Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
1124 101030 - Disclosure - Related Party Transactions - Additional Information (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails
1125 Implied Table Table

*

*

 implied:Table
1126 Disclosure Of Transactions Between Related Parties [Abstract] Abstract ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesAbstract
1127 Related party transactions description Concept (Text/String) For Period ifrs-full:DescriptionOfTransactionsWithRelatedParty
1128 101040 - Disclosure - Related Party Transactions - Summary of Key Management Compensation (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureRelatedPartyTransactionsSummaryOfKeyManagementCompensationDetails
1129 Disclosure Of Transactions Between Related Parties [Table] Table

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*

 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1130 Separate management entities [axis] Axis ifrs-full:SeparateManagementEntitiesAxis
1131 Separate management entities [member] Member ifrs-full:SeparateManagementEntitiesMember
1132 Salaries and Benefits Member alo:SalariesAndAllowanceMember
1133 Bonuses Member alo:BonusMember
1134 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1135 Key management compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1136 Share-based payments Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
1137 Termination benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationTerminationBenefits
1138 Key management personnel compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1139 101050 - Disclosure - Management of Capital - Summary of Capital (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureManagementOfCapitalSummaryOfCapitalDetails
1140 Implied Table Table

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*

 implied:Table
1141 Disclosure Of Objectives Policies And Processes For Managing Capital [Abstract] Abstract ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalAbstract
1142 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
1143 Equipment loans payable Concept (Monetary) As Of Credit alo:EquipmentLoanPayable
1144 Other financial liability Concept (Monetary) As Of Credit ifrs-full:OtherFinancialLiabilities
1145 Gross consolidated equity and equipment financing Concept (Monetary) As Of Credit alo:GrossConsolidatedEquityAndEquipmentFinancing
1146 Less: Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
1147 Less: Short-term investments Concept (Monetary) As Of Debit ifrs-full:CurrentHeldtomaturityInvestments
1148 Net consolidated equity, equipment loans payable and other financial liability Concept (Monetary) As Of Credit alo:NetConsolidatedEquityAndEquipmentFinancing
1149 101060 - Disclosure - Commitments and Contingencies - Summary of Undiscounted Liabilities and Future Operating Commitments (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfUndiscountedLiabilitiesAndFutureOperatingCommitmentsDetails
1150 Disclosure Of Commitments And Contingencies [Table] Table

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*

 alo:DisclosureOfCommitmentsAndContingenciesTable
1151 Maturity [axis] Axis ifrs-full:MaturityAxis
1152 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1153 Within 1 Year Member ifrs-full:NotLaterThanOneYearMember
1154 2-5 Years Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1155 Greater than 5 Years Member ifrs-full:LaterThanFiveYearsMember
1156 Disclosure Of Commitments And Contingencies [Line Items] LineItems alo:DisclosureOfCommitmentsAndContingenciesLineItems
1157 Maturity analysis of financial liabilities Abstract ifrs-full:DisclosureOfMaturityAnalysisForDerivativeFinancialLiabilitiesAbstract
1158 Trade payables and accrued liabilities Concept (Monetary) As Of Credit alo:TradePayablesAndAccruedLiabilitiesCurrent
1159 Equipment loan payable Concept (Monetary) As Of Credit alo:EquipmentLoansPayables
1160 Other financial liability Concept (Monetary) As Of Credit ifrs-full:OtherFinancialLiabilities
1161 Interest payments on equipment financing Concept (Monetary) As Of Credit alo:InterestPaymentsOnEquipmentFinancing
1162 Interest payments on other financial liability Concept (Monetary) As Of Credit alo:InterestPaymentsOnOtherFinancialLiability
1163 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1164 Commitments Abstract alo:CommitmentsAbstract
1165 Future operating commitments Concept (Monetary) As Of Credit alo:FutureOperatingCommitments
1166 Provision for site reclamation and closure Concept (Monetary) As Of Credit ifrs-full:RestructuringProvision
1167 Other provisions Concept (Monetary) As Of Credit alo:OtherProvisionsForCommitments
1168 Commitments Concept (Monetary) As Of Credit alo:Commitments
1169 Total financial liabilities and commitments Concept (Monetary) As Of Credit alo:FinancialLiabilitiesAndCommitments
1170 101070 - Disclosure - Commitments and Contingencies - Summary of Undiscounted Liabilities and Future Operating Commitments (Parenthetical) (Details) Network

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*

 http://www.aliogold.com/20181231/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfUndiscountedLiabilitiesAndFutureOperatingCommitmentsParentheticalDetails
1171 Disclosure Of Commitments And Contingencies [Table] Table

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*

 alo:DisclosureOfCommitmentsAndContingenciesTable
1172 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1173 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1174 Cyanco Company LLC [Member] Member alo:CyancoCompanyLLCMember
1175 Segments [axis] Axis ifrs-full:SegmentsAxis
1176 Segments [member] Member ifrs-full:SegmentsMember
1177 San Francisco Mine Member alo:SanFranciscoMineMember
1178 Florida Canyon Mine [member] Member alo:FloridaCanyonMineMember
1179 Disclosure Of Commitments And Contingencies [Line Items] LineItems alo:DisclosureOfCommitmentsAndContingenciesLineItems
1180 Cyanide contract maturity period Concept (xbrli:durationItemType) For Period alo:CyanideContractMaturityPeriod
1181 Effective date of contract Concept (Date) For Period alo:EffectiveDateOfContract
1182 Minimum volume of cyanide to be purchased under future operating commitments Concept (num:massItemType) For Period alo:MinimumVolumeOfCyanideToBePurchasedUnderFutureOperatingCommitments
1183 Total undiscounted amount of estimated cash flows requited to settle retirement obligation Concept (Monetary) For Period Credit alo:NetUndiscountedAmountOfEstimatedCashFlowsRequitedToSettleRetirementObligationOfRestructuringProvision
1184 Annualized discount rate of contract Concept (Percent) For Period alo:AnnualizedDiscountRateOfContract
1185 Obligation Determined Concept (Monetary) As Of Credit alo:ObligationDetermined
1186 101080 - Disclosure - Commitments and Contingencies - Additional Information (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetails
1187 Disclosure Of Commitments And Contingencies [Table] Table

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*

 alo:DisclosureOfCommitmentsAndContingenciesTable
1188 Classes of contingent liabilities [axis] Axis ifrs-full:ClassesOfContingentLiabilitiesAxis
1189 Contingent liabilities [member] Member ifrs-full:ContingentLiabilitiesMember
1190 Peal [member] Member alo:PealMember
1191 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1192 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1193 Subsequent [Member] Member alo:EventsAfterReportingPeriodMember
1194 Disclosure Of Commitments And Contingencies [Line Items] LineItems alo:DisclosureOfCommitmentsAndContingenciesLineItems
1195 Termination penalty Concept (Monetary) As Of Credit alo:ContingentTerminationPenalty
1196 Liability recognized Concept (Monetary) As Of ifrs-full:EstimatedFinancialEffectOfContingentLiabilities
1197 101090 - Disclosure - Segmented Information - Additional Information (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureSegmentedInformationAdditionalInformationDetails
1198 Implied Table Table

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 implied:Table
1199 Disclosure Of Operating Segments [Abstract] Abstract ifrs-full:DisclosureOfOperatingSegmentsAbstract
1200 Number of reportable operating segment Concept (Integer) For Period alo:NumberOfReportableOperatingSegments
1201 Number of major customers Concept (Integer) For Period alo:NumberOfMajorCustomers
1202 101100 - Disclosure - Segmented Information - Schedule of Segmented Information (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureSegmentedInformationScheduleOfSegmentedInformationDetails
1203 Disclosure Of Operating Segments [Table] Table

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*

 ifrs-full:DisclosureOfOperatingSegmentsTable
1204 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1205 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1206 Operating segments [member] Member ifrs-full:OperatingSegmentsMember
1207 Other Member ifrs-full:UnallocatedAmountsMember
1208 Segments [axis] Axis ifrs-full:SegmentsAxis
1209 Segments [member] Member ifrs-full:SegmentsMember
1210 San Francisco Mine Member alo:SanFranciscoMineMember
1211 Florida Canyon Mine [member] Member alo:FloridaCanyonMineMember
1212 Ana Paula Project Member alo:AnaPaulaProjectMember
1213 Disclosure Of Operating Segments [Line Items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
1214 Metal revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
1215 Production costs Concept (Monetary) For Period Debit alo:ProductionCosts1
1216 Depreciation and depletion Concept (Monetary) For Period Debit alo:DepreciationAndDepletion
1217 Corporate and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
1218 Loss on sale of asset Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnDisposalsOfNoncurrentAssets
1219 Impairment of El Sauzal Plant Concept (Monetary) For Period Debit ifrs-full:ImpairmentLossRecognisedInProfitOrLoss
1220 (Loss) earnings from operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
1221 Capital expenditures Concept (Monetary) For Period Debit alo:CapitalExpenditures
1222 Total assets Concept (Monetary) As Of Debit ifrs-full:Assets
1223 Total liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
1224 101110 - Disclosure - Segmented Information - Percentage of Metal Revenues by Major Customers (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureSegmentedInformationPercentageOfMetalRevenuesByMajorCustomersDetails
1225 Disclosure Of Major Customers [Table] Table

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*

 ifrs-full:DisclosureOfMajorCustomersTable
1226 Major customers [axis] Axis ifrs-full:MajorCustomersAxis
1227 Customers [member] Member ifrs-full:MajorCustomersMember
1228 Customer A Member alo:CustomerAMember
1229 Customer B Member alo:CustomerBMember
1230 Customer C Member alo:CustomerCMember
1231 Customer D Member alo:CustomerDMember
1232 Disclosure Of Major Customers [Line Items] LineItems ifrs-full:DisclosureOfMajorCustomersLineItems
1233 Percentage of revenue Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
1234 101120 - Disclosure - Segmented Information - Company's Metal Revenues from Operations (Details) Network

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 http://www.aliogold.com/20181231/taxonomy/role/DisclosureSegmentedInformationCompanySMetalRevenuesFromOperationsDetails
1235 Implied Table Table

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*

 implied:Table
1236 Disclosure Of Products And Services [Abstract] Abstract ifrs-full:DisclosureOfProductsAndServicesAbstract
1237 Gold Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfGold
1238 Silver by-product Concept (Monetary) For Period Credit ifrs-full:RevenueFromSaleOfSilver
1239 Metal revenues Concept (Monetary) For Period Credit ifrs-full:Revenue

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