Avalon Advanced Materials Inc. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 101 - Document - Document and Entity Information Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DocumentAndEntityInformation
2 Statement [Table] Table

*

*

 avl:StatementTable
3 Legal Entity [Axis] Axis dei:LegalEntityAxis
4 Entity [Domain] Member dei:EntityDomain
5 Statement [Line Items] LineItems avl:StatementLineItems
6 Document Type Concept (Submission Type) For Period dei:DocumentType
7 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
8 Amendment Description Concept (Text/String) For Period dei:AmendmentDescription
9 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
10 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
11 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
12 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
13 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
14 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
15 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
16 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
17 Entity Voluntary Filers Concept (Yes/No) For Period dei:EntityVoluntaryFilers
18 Entity Well Known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
19 Entity Public Float Concept (Monetary) As Of Credit dei:EntityPublicFloat
20 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
21 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
22 102 - Statement - Consolidated Statements of Financial Position Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/BalanceSheet
23 Statement [Table] Table

*

*

 avl:StatementTable
24 Statement [Line Items] LineItems avl:StatementLineItems
25 Assets Abstract ifrs-full:AssetsAbstract
26 Current Assets Abstract ifrs-full:CurrentAssetsAbstract
27 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
28 Other receivables Concept (Monetary) As Of Debit ifrs-full:OtherCurrentReceivables
29 Prepaid expenses and deposits Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
30 Total Current Assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
31 Non-Current Assets Abstract ifrs-full:NoncurrentAssetsAbstract
32 Exploration and evaluation assets Concept (Monetary) As Of Debit ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
33 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
34 Total Non-Current Assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
35 Total Assets Concept (Monetary) As Of Debit ifrs-full:Assets
36 Liabilities Abstract ifrs-full:LiabilitiesAbstract
37 Current Liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
38 Accounts payable Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
39 Accrued liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
40 Deferred flow-through share premium Concept (Monetary) As Of Credit avl:DeferredFlowThroughSharePremium
41 Warrants denominated in foreign currency Concept (Monetary) As Of Credit avl:WarrantsDenominatedInForeignCurrency
42 Total Current Liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
43 Non-Current Liabilities Abstract ifrs-full:NoncurrentLiabilitiesAbstract
44 Convertible redeemable preferred shares Concept (Monetary) As Of Credit avl:ConvertibleRedeemablePreferredShares
45 Derivative liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
46 Site closure and reclamation provisions Concept (Monetary) As Of Credit ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
47 Total Non-current Liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
48 Total Liabilities Concept (Monetary) As Of Credit ifrs-full:Liabilities
49 Shareholders Equity Abstract ifrs-full:EquityAbstract
50 Share Capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
51 Reserve for Warrants Concept (Monetary) As Of Credit ifrs-full:OtherReserves
52 Reserve for Share Based Payments Concept (Monetary) As Of Credit ifrs-full:ReserveOfSharebasedPayments
53 Reserve for Brokers' Compensation Warrants Concept (Monetary) As Of Credit avl:ReserveForBrokersCompensationWarrants
54 Accumulated Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
55 Total Shareholders Equity Concept (Monetary) As Of Credit ifrs-full:Equity
56 Total Liabilities and Shareholders Equity Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
57 103 - Statement - Consolidated Statements of Comprehensive Loss Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/IncomeStatement
58 Statement [Table] Table

*

*

 avl:StatementTable
59 Statement [Line Items] LineItems avl:StatementLineItems
60 Revenue Abstract ifrs-full:RevenueAbstract
61 Interest Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
62 Expenses Abstract ifrs-full:ExpenseByNatureAbstract
63 Corporate and administrative Concept (Monetary) For Period Debit ifrs-full:AdministrativeExpense
64 Impairment loss on exploration and evaluation assets Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
65 Write-off of land acquisition option payments Concept (Monetary) For Period Debit avl:WriteOffOfLandAcquisitionOptionPayments
66 General exploration Concept (Monetary) For Period Debit avl:GeneralExplorationExpense
67 Depreciation Concept (Monetary) For Period Debit ifrs-full:DepreciationExpense
68 Share based compensation Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
69 Foreign exchange (gain) loss Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
70 Financing transaction costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
71 Increase (Decrease) in fair value of warrants denominated in foreign currency Concept (Monetary) For Period Debit avl:IncreaseDecreaseInFairValueOfWarrantsDenominatedInForeignCurrency
72 Increase in fair value of convertible redeemable preferred shares Concept (Monetary) For Period Debit avl:IncreaseDecreaseInFairValueOfConvertibleRedeemablePreferredShares
73 Increase (Decrease) in fair value of derivative liabilities Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
74 Total Expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
75 Net Loss before Income Taxes Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
76 Deferred Income Tax Recoveries Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
77 Net Loss and Total Comprehensive Loss for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
78 Loss per Share - Basic and Diluted Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
79 Weighted Average Number of Common Shares Outstanding, Basic and Diluted Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
80 104 - Statement - Consolidated Statements of Changes in Equity Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/StockholdersEquity
81 Statement [Table] Table

*

*

 avl:StatementTable
82 Components of equity [Axis] Axis ifrs-full:ComponentsOfEquityAxis
83 Equity components [Domain] Member ifrs-full:EquityMember
84 Share Capital [Member] Member ifrs-full:IssuedCapitalMember
85 Warrants [Member] Member avl:WarrantsMember
86 Share Based Payments [Member] Member ifrs-full:ReserveOfSharebasedPaymentsMember
87 Brokers Compensation Warrants [Member] Member avl:BrokersCompensationWarrantsMember
88 Accumulated Deficit [Member] Member ifrs-full:RetainedEarningsMember
89 Statement [Line Items] LineItems avl:StatementLineItems
90 Beginning Balance Concept (Monetary) As Of Credit ifrs-full:Equity
91 Beginning Balance (Shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
92 Equity offerings Concept (Monetary) For Period Credit ifrs-full:IssueOfEquity
93 Equity offerings (Shares) Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
94 Issue for other considerations Concept (Monetary) For Period Credit avl:IssueOfEquityForNonCashConsiderations
95 Issue for other considerations (Shares) Concept (Shares) For Period avl:IssueOfEquityForNonCashConsiderationsShares
96 Exercise of options Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
97 Exercise of options (Shares) Concept (Shares) For Period avl:IncreaseInNumberOfSharesOutstandingThroughExerciseOfOptions
98 Reserve transferred on exercise of options Concept (Monetary) For Period Credit avl:IncreaseDecreaseThroughReserveTransferredOnExerciseOfOptions
99 Conversion of redeemable preferred shares Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments
100 Conversion of redeemable preferred shares (Shares) Concept (Shares) For Period avl:IncreaseInNumberOfSharesOutstandinghroughConversionOfConvertibleInstruments
101 Exercise of warrants Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
102 Exercise of warrants (Shares) Concept (Shares) For Period avl:IncreaseInNumberOfSharesOutstandingThroughExerciseOfWarrants
103 Reserve transferred on exercise of warrants Concept (Monetary) For Period Credit avl:IncreaseDecreaseThroughReserveTransferredOnExerciseOfWarrants
104 Exercise of brokers compensation warrants Concept (Monetary) For Period Credit avl:IncreaseInNumberOfSharesThroughExerciseOfCompensationWarrants
105 Exercise of brokers compensation warrants (Shares) Concept (Shares) For Period avl:IncreaseInNumberOfSharesThroughExerciseOfCompensationWarrantsShares
106 Reserve transferred on exercise of compensation warrants Concept (Monetary) For Period Credit avl:IncreaseDecreaseThroughReserveTransferredOnExerciseOfCompensationWarrants
107 Compensation warrants issued on equity offerings Concept (Monetary) For Period Credit avl:IncreaseThroughCompensationWarrantsIssuedOnEquityOfferings
108 Share based compensation Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
109 Share issuance costs - cash Concept (Monetary) For Period Debit ifrs-full:ShareIssueRelatedCost
110 Share issuance costs - compensation warrants issued Concept (Monetary) For Period Debit avl:ShareIssueRelatedCostNonCash
111 Net loss for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
112 Ending Balance Concept (Monetary) As Of Credit ifrs-full:Equity
113 Ending Balance (Shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
114 105 - Statement - Consolidated Statements of Cash Flows Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/CashFlows
115 Statement [Table] Table

*

*

 avl:StatementTable
116 Statement [Line Items] LineItems avl:StatementLineItems
117 Operating Activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
118 Cash paid to employees Concept (Monetary) For Period Credit ifrs-full:PaymentsToAndOnBehalfOfEmployees
119 Cash paid to suppliers Concept (Monetary) For Period Credit ifrs-full:PaymentsToSuppliersForGoodsAndServices
120 Interest received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsOperatingActivities
121 Cash Used By Operating Activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
122 Financing Activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
123 Net proceeds from equity offerings Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingOtherEquityInstruments
124 Net proceeds from issuance of preferred shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfPreferenceShares
125 Proceeds from exercise of stock options Concept (Monetary) For Period Debit ifrs-full:ProceedsFromExerciseOfOptions
126 Proceeds from exercise of warrants Concept (Monetary) For Period Debit avl:ProceedsFromExerciseOfWarrants
127 Proceeds from exercise of brokers' compensation warrants Concept (Monetary) For Period Debit avl:ProceedsFromExerciseOfBrokersCompensationWarrants
128 Cash Provided by Financing Activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
129 Investing Activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
130 Exploration and evaluation assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfExplorationAndEvaluationAssets
131 Property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
132 Cash Used by Investing Activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
133 Change in Cash and Cash Equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
134 Foreign Exchange Effect on Cash Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
135 Cash and Cash Equivalents beginning of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
136 Cash and Cash Equivalents end of year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
137 106 - Disclosure - Nature of Operations and Going Concern Uncertainty Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfGoingConcernExplanatoryTextBlock
138 Statement [Table] Table

*

*

 avl:StatementTable
139 Legal Entity [Axis] Axis dei:LegalEntityAxis
140 Entity [Domain] Member dei:EntityDomain
141 Statement [Line Items] LineItems avl:StatementLineItems
142 Nature of Operations and Going Concern Uncertainty [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGoingConcernExplanatory
143 107 - Disclosure - Basis of Presentation Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBasisOfPreparationOfFinancialStatementsExplanatoryTextBlock
144 Statement [Table] Table

*

*

 avl:StatementTable
145 Legal Entity [Axis] Axis dei:LegalEntityAxis
146 Entity [Domain] Member dei:EntityDomain
147 Statement [Line Items] LineItems avl:StatementLineItems
148 Basis of Presentation [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
149 108 - Disclosure - Summary of Significant Accounting Policies Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryTextBlock
150 Statement [Table] Table

*

*

 avl:StatementTable
151 Legal Entity [Axis] Axis dei:LegalEntityAxis
152 Entity [Domain] Member dei:EntityDomain
153 Statement [Line Items] LineItems avl:StatementLineItems
154 Summary of Significant Accounting Policies [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
155 109 - Disclosure - Recent Accounting Pronouncements Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfChangesInAccountingPoliciesExplanatoryTextBlock
156 Statement [Table] Table

*

*

 avl:StatementTable
157 Legal Entity [Axis] Axis dei:LegalEntityAxis
158 Entity [Domain] Member dei:EntityDomain
159 Statement [Line Items] LineItems avl:StatementLineItems
160 Recent Accounting Pronouncements [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfChangesInAccountingPoliciesExplanatory
161 110 - Disclosure - Cash and Cash Equivalents Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatoryTextBlock
162 Statement [Table] Table

*

*

 avl:StatementTable
163 Legal Entity [Axis] Axis dei:LegalEntityAxis
164 Entity [Domain] Member dei:EntityDomain
165 Statement [Line Items] LineItems avl:StatementLineItems
166 Cash and Cash Equivalents [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
167 111 - Disclosure - Exploration and Evaluation Assets Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfExplorationAndEvaluationAssetsExplanatoryTextBlock
168 Statement [Table] Table

*

*

 avl:StatementTable
169 Legal Entity [Axis] Axis dei:LegalEntityAxis
170 Entity [Domain] Member dei:EntityDomain
171 Statement [Line Items] LineItems avl:StatementLineItems
172 Exploration and Evaluation Assets [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExplorationAndEvaluationAssetsExplanatory
173 112 - Disclosure - Property, Plant and Equipment Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatoryTextBlock
174 Statement [Table] Table

*

*

 avl:StatementTable
175 Legal Entity [Axis] Axis dei:LegalEntityAxis
176 Entity [Domain] Member dei:EntityDomain
177 Statement [Line Items] LineItems avl:StatementLineItems
178 Property, Plant and Equipment [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
179 113 - Disclosure - Deferred Flow-Through Share Premium Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDeferredFlowthroughSharePremiumExplanatoryTextBlock
180 Statement [Table] Table

*

*

 avl:StatementTable
181 Legal Entity [Axis] Axis dei:LegalEntityAxis
182 Entity [Domain] Member dei:EntityDomain
183 Statement [Line Items] LineItems avl:StatementLineItems
184 Deferred Flow-Through Share Premium [Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDeferredFlowthroughSharePremiumExplanatoryTextBlock
185 114 - Disclosure - Convertible Redeemable Preferred Shares Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfConvertibleRedeemablePreferredSharesExplanatoryTextBlock
186 Statement [Table] Table

*

*

 avl:StatementTable
187 Legal Entity [Axis] Axis dei:LegalEntityAxis
188 Entity [Domain] Member dei:EntityDomain
189 Statement [Line Items] LineItems avl:StatementLineItems
190 Convertible Redeemable Preferred Shares [Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfConvertibleRedeemablePreferredSharesExplanatoryTextBlock
191 115 - Disclosure - Derivative Liabilities Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDerivativeFinancialInstrumentsExplanatoryTextBlock
192 Statement [Table] Table

*

*

 avl:StatementTable
193 Legal Entity [Axis] Axis dei:LegalEntityAxis
194 Entity [Domain] Member dei:EntityDomain
195 Statement [Line Items] LineItems avl:StatementLineItems
196 Derivative Liabilities [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
197 116 - Disclosure - Site Closure and Reclamation Provision Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSiteClosureAndReclamationProvisionExplanatoryTextBlock
198 Statement [Table] Table

*

*

 avl:StatementTable
199 Legal Entity [Axis] Axis dei:LegalEntityAxis
200 Entity [Domain] Member dei:EntityDomain
201 Statement [Line Items] LineItems avl:StatementLineItems
202 Site Closure and Reclamation Provision [Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfSiteClosureAndReclamationProvisionExplanatoryTextBlock
203 117 - Disclosure - Share Capital Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIssuedCapitalExplanatoryTextBlock
204 Statement [Table] Table

*

*

 avl:StatementTable
205 Legal Entity [Axis] Axis dei:LegalEntityAxis
206 Entity [Domain] Member dei:EntityDomain
207 Statement [Line Items] LineItems avl:StatementLineItems
208 Share Capital [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIssuedCapitalExplanatory
209 118 - Disclosure - Corporate and Administrative Expenses Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfGeneralAndAdministrativeExpenseExplanatoryTextBlock
210 Statement [Table] Table

*

*

 avl:StatementTable
211 Legal Entity [Axis] Axis dei:LegalEntityAxis
212 Entity [Domain] Member dei:EntityDomain
213 Statement [Line Items] LineItems avl:StatementLineItems
214 Corporate and Administrative Expenses [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfGeneralAndAdministrativeExpenseExplanatory
215 120 - Disclosure - Capital Management Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatoryTextBlock
216 Statement [Table] Table

*

*

 avl:StatementTable
217 Legal Entity [Axis] Axis dei:LegalEntityAxis
218 Entity [Domain] Member dei:EntityDomain
219 Statement [Line Items] LineItems avl:StatementLineItems
220 Capital Management [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalExplanatory
221 121 - Disclosure - Related Party Disclosures Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatoryTextBlock
222 Statement [Table] Table

*

*

 avl:StatementTable
223 Legal Entity [Axis] Axis dei:LegalEntityAxis
224 Entity [Domain] Member dei:EntityDomain
225 Statement [Line Items] LineItems avl:StatementLineItems
226 Related Party Disclosures [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
227 122 - Disclosure - Financial Instruments Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatoryTextBlock
228 Statement [Table] Table

*

*

 avl:StatementTable
229 Legal Entity [Axis] Axis dei:LegalEntityAxis
230 Entity [Domain] Member dei:EntityDomain
231 Statement [Line Items] LineItems avl:StatementLineItems
232 Financial Instruments [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
233 123 - Disclosure - Supplemental Cash Flow Information Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashFlowStatementExplanatoryTextBlock
234 Statement [Table] Table

*

*

 avl:StatementTable
235 Legal Entity [Axis] Axis dei:LegalEntityAxis
236 Entity [Domain] Member dei:EntityDomain
237 Statement [Line Items] LineItems avl:StatementLineItems
238 Supplemental Cash Flow Information [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashFlowStatementExplanatory
239 124 - Disclosure - Income Taxes Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatoryTextBlock
240 Statement [Table] Table

*

*

 avl:StatementTable
241 Legal Entity [Axis] Axis dei:LegalEntityAxis
242 Entity [Domain] Member dei:EntityDomain
243 Statement [Line Items] LineItems avl:StatementLineItems
244 Income Taxes [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
245 125 - Disclosure - Loss per Share Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatoryTextBlock
246 Statement [Table] Table

*

*

 avl:StatementTable
247 Legal Entity [Axis] Axis dei:LegalEntityAxis
248 Entity [Domain] Member dei:EntityDomain
249 Statement [Line Items] LineItems avl:StatementLineItems
250 Loss per Share [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
251 126 - Disclosure - Operating Lease Arrangements Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfLeasesExplanatoryTextBlock
252 Statement [Table] Table

*

*

 avl:StatementTable
253 Legal Entity [Axis] Axis dei:LegalEntityAxis
254 Entity [Domain] Member dei:EntityDomain
255 Statement [Line Items] LineItems avl:StatementLineItems
256 Operating Lease Arrangements [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfLeasesExplanatory
257 127 - Disclosure - Commitments Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsExplanatoryTextBlock
258 Statement [Table] Table

*

*

 avl:StatementTable
259 Legal Entity [Axis] Axis dei:LegalEntityAxis
260 Entity [Domain] Member dei:EntityDomain
261 Statement [Line Items] LineItems avl:StatementLineItems
262 Commitments [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsExplanatory
263 128 - Disclosure - Events After the Reporting Period Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEventsAfterReportingPeriodExplanatoryTextBlock
264 Statement [Table] Table

*

*

 avl:StatementTable
265 Legal Entity [Axis] Axis dei:LegalEntityAxis
266 Entity [Domain] Member dei:EntityDomain
267 Statement [Line Items] LineItems avl:StatementLineItems
268 Events After the Reporting Period [Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
269 129 - Disclosure - Summary of Significant Accounting Policies (Policies) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsSignificantAccountingPoliciesTextBlockPolicies
270 Statement [Table] Table

*

*

 avl:StatementTable
271 Legal Entity [Axis] Axis dei:LegalEntityAxis
272 Entity [Domain] Member dei:EntityDomain
273 Statement [Line Items] LineItems avl:StatementLineItems
274 Foreign Currency Transactions [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
275 Share Based Payments [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
276 Leases [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
277 Income Taxes [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
278 Flow-through Shares [Policy Text Block] Concept (Text Block (HTML)) For Period avl:DescriptionOfAccountingPolicyForFlowthroughSharesExplanatoryPolicyTextBlock
279 Loss per Share [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
280 Other Comprehensive Income (Loss) [Policy Text Block] Concept (Text Block (HTML)) For Period avl:DescriptionOfAccountingPolicyForOtherComprehensiveIncomeLossExplanatoryPolicyTextBlock
281 Cash and Cash Equivalents [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyToDetermineComponentsOfCashAndCashEquivalents
282 Exploration and Evaluation Assets [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForExplorationAndEvaluationExpenditures
283 Property, plant and equipment [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
284 Impairment of Non-Financial Assets [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory
285 Financial Instruments [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
286 Site Closure and Reclamation Provision [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForDecommissioningRestorationAndRehabilitationProvisionsExplanatory
287 Other Provisions [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
288 Related Party Disclosure [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForTransactionsWithRelatedPartiesExplanatory
289 Segment Reporting [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
290 Critical Accounting Judgments and Estimation Uncertainties [Policy Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
291 130 - Disclosure - Summary of Significant Accounting Policies (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSummaryOfSignificantAccountingPoliciesExplanatoryTextBlockTables
292 Statement [Table] Table

*

*

 avl:StatementTable
293 Legal Entity [Axis] Axis dei:LegalEntityAxis
294 Entity [Domain] Member dei:EntityDomain
295 Statement [Line Items] LineItems avl:StatementLineItems
296 Disclosure of detailed information about estimated useful life or depreciation rate [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutEstimatedUsefulLifeOrDepreciationRateExplanatoryTableTextBlock
297 131 - Disclosure - Cash and Cash Equivalents (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashAndCashEquivalentsExplanatoryTextBlockTables
298 Statement [Table] Table

*

*

 avl:StatementTable
299 Legal Entity [Axis] Axis dei:LegalEntityAxis
300 Entity [Domain] Member dei:EntityDomain
301 Statement [Line Items] LineItems avl:StatementLineItems
302 Disclosure of detailed information about cash and cash equivalents [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatory
303 132 - Disclosure - Exploration and Evaluation Assets (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfExplorationAndEvaluationAssetsExplanatoryTextBlockTables
304 Statement [Table] Table

*

*

 avl:StatementTable
305 Legal Entity [Axis] Axis dei:LegalEntityAxis
306 Entity [Domain] Member dei:EntityDomain
307 Statement [Line Items] LineItems avl:StatementLineItems
308 Disclosure of detailed information about exploration and evaluation assets [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutExplorationAndEvaluationAssetsExplanatoryTableTextBlock
309 133 - Disclosure - Property, Plant and Equipment (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatoryTextBlockTables
310 Statement [Table] Table

*

*

 avl:StatementTable
311 Legal Entity [Axis] Axis dei:LegalEntityAxis
312 Entity [Domain] Member dei:EntityDomain
313 Statement [Line Items] LineItems avl:StatementLineItems
314 Disclosure of detailed information about property, plant and equipment [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
315 134 - Disclosure - Deferred Flow-Through Share Premium (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDeferredFlowthroughSharePremiumExplanatoryTextBlockTables
316 Statement [Table] Table

*

*

 avl:StatementTable
317 Legal Entity [Axis] Axis dei:LegalEntityAxis
318 Entity [Domain] Member dei:EntityDomain
319 Statement [Line Items] LineItems avl:StatementLineItems
320 Disclosure of detailed information about deferred flow-through share premium [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutDeferredFlowthroughSharePremiumExplanatoryTableTextBlock
321 135 - Disclosure - Convertible Redeemable Preferred Shares (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfConvertibleRedeemablePreferredSharesExplanatoryTextBlockTables
322 Statement [Table] Table

*

*

 avl:StatementTable
323 Legal Entity [Axis] Axis dei:LegalEntityAxis
324 Entity [Domain] Member dei:EntityDomain
325 Statement [Line Items] LineItems avl:StatementLineItems
326 Disclosure of detailed information about convertible redeemable preferred shares [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutConvertibleRedeemablePreferredSharesExplanatoryTableTextBlock
327 136 - Disclosure - Derivative Liabilities (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDerivativeFinancialInstrumentsExplanatoryTextBlockTables
328 Statement [Table] Table

*

*

 avl:StatementTable
329 Legal Entity [Axis] Axis dei:LegalEntityAxis
330 Entity [Domain] Member dei:EntityDomain
331 Statement [Line Items] LineItems avl:StatementLineItems
332 Disclosure of detailed information about derivative liabilities [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutDerivativeLiabilitiesExplanatoryTableTextBlock
333 137 - Disclosure - Site Closure and Reclamation Provision (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSiteClosureAndReclamationProvisionExplanatoryTextBlockTables
334 Statement [Table] Table

*

*

 avl:StatementTable
335 Legal Entity [Axis] Axis dei:LegalEntityAxis
336 Entity [Domain] Member dei:EntityDomain
337 Statement [Line Items] LineItems avl:StatementLineItems
338 Disclosure of detailed information about site closure and reclamation provision [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutSiteClosureAndReclamationProvisionExplanatoryTableTextBlock
339 138 - Disclosure - Share Capital (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIssuedCapitalExplanatoryTextBlockTables
340 Statement [Table] Table

*

*

 avl:StatementTable
341 Legal Entity [Axis] Axis dei:LegalEntityAxis
342 Entity [Domain] Member dei:EntityDomain
343 Statement [Line Items] LineItems avl:StatementLineItems
344 Disclosure of number and weighted average exercise prices of warrants [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfNumberAndWeightedAverageExercisePricesOfWarrantsExplanatoryTableTextBlock
345 Disclosure of number and weighted average exercise prices of share options [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
346 Disclosure of detailed information about options, valuation assumptions [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutOptionsValuationAssumptionsExplanatory
347 Disclosure of range of exercise prices of outstanding share options [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory
348 Disclosure of number and weighted average exercise prices of brokers compensation warrants [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfNumberAndWeightedAverageExercisePricesOfBrokersCompensationWarrantsExplanatoryTableTextBlock
349 139 - Disclosure - Corporate and Administrative Expenses (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfGeneralAndAdministrativeExpenseExplanatoryTextBlockTables
350 Statement [Table] Table

*

*

 avl:StatementTable
351 Legal Entity [Axis] Axis dei:LegalEntityAxis
352 Entity [Domain] Member dei:EntityDomain
353 Statement [Line Items] LineItems avl:StatementLineItems
354 Disclosure of expenses by nature [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesByNatureExplanatory
355 140 - Disclosure - Related Party Disclosures (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfRelatedPartyExplanatoryTextBlockTables
356 Statement [Table] Table

*

*

 avl:StatementTable
357 Legal Entity [Axis] Axis dei:LegalEntityAxis
358 Entity [Domain] Member dei:EntityDomain
359 Statement [Line Items] LineItems avl:StatementLineItems
360 Disclosure of information about key management personnel [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInformationAboutKeyManagementPersonnelExplanatory
361 141 - Disclosure - Financial Instruments (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatoryTextBlockTables
362 Statement [Table] Table

*

*

 avl:StatementTable
363 Legal Entity [Axis] Axis dei:LegalEntityAxis
364 Entity [Domain] Member dei:EntityDomain
365 Statement [Line Items] LineItems avl:StatementLineItems
366 Disclosure of liquidity risk [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfLiquidityRiskExplanatory
367 142 - Disclosure - Supplemental Cash Flow Information (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCashFlowStatementExplanatoryTextBlockTables
368 Statement [Table] Table

*

*

 avl:StatementTable
369 Legal Entity [Axis] Axis dei:LegalEntityAxis
370 Entity [Domain] Member dei:EntityDomain
371 Statement [Line Items] LineItems avl:StatementLineItems
372 Disclosure of detailed information about non cash financing and investing transactions [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutNonCashFinancingAndInvestingTransactionsExplanatoryTableTextBlock
373 143 - Disclosure - Income Taxes (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIncomeTaxExplanatoryTextBlockTables
374 Statement [Table] Table

*

*

 avl:StatementTable
375 Legal Entity [Axis] Axis dei:LegalEntityAxis
376 Entity [Domain] Member dei:EntityDomain
377 Statement [Line Items] LineItems avl:StatementLineItems
378 Disclosure of detailed information about effective income tax expense recovery [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutEffectiveIncomeTaxExpenseRecoveryExplanatory
379 Disclosure of deferred taxes [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
380 Disclosure of temporary difference, unused tax losses and unused tax credits [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory
381 Disclosure of detailed information about non-capital losses [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutNoncapitalLossesExplanatoryTableTextBlock
382 Disclosure of detailed information about operating losses [Table Text Block] Concept (Text Block (HTML)) For Period avl:DisclosureOfDetailedInformationAboutOperatingLossesExplanatoryTableTextBlock
383 144 - Disclosure - Loss per Share (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatoryTextBlockTables
384 Statement [Table] Table

*

*

 avl:StatementTable
385 Legal Entity [Axis] Axis dei:LegalEntityAxis
386 Entity [Domain] Member dei:EntityDomain
387 Statement [Line Items] LineItems avl:StatementLineItems
388 Earnings per share [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
389 145 - Disclosure - Operating Lease Arrangements (Tables) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfLeasesExplanatoryTextBlockTables
390 Statement [Table] Table

*

*

 avl:StatementTable
391 Legal Entity [Axis] Axis dei:LegalEntityAxis
392 Entity [Domain] Member dei:EntityDomain
393 Statement [Line Items] LineItems avl:StatementLineItems
394 Disclosure of maturity analysis of operating lease payments [Table Text Block] Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
395 146 - Disclosure - Nature of Operations and Going Concern Uncertainty (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfGoingConcernExplanatoryDetails
396 Statement [Table] Table

*

*

 avl:StatementTable
397 Commitments [Axis] Axis avl:CommitmentsAxis
398 Commitments [Domain] Member avl:CommitmentsDomain
399 Canadian exploration expenses [Member] Member avl:CanadianExplorationExpensesMember
400 Legal Entity [Axis] Axis dei:LegalEntityAxis
401 Entity [Domain] Member dei:EntityDomain
402 Statement [Line Items] LineItems avl:StatementLineItems
403 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
404 Accumulated Deficit Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
405 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
406 Working capital deficit Concept (Monetary) As Of Debit avl:WorkingCapital
407 Deferred flow-through share premium Concept (Monetary) As Of Credit avl:DeferredFlowThroughSharePremium
408 Warrants denominated in foreign currency Concept (Monetary) As Of Credit avl:WarrantsDenominatedInForeignCurrency
409 Adjusted working capital deficit Concept (Monetary) As Of Debit avl:AdjustedWorkingCapital
410 Capital commitments Concept (Monetary) As Of Credit ifrs-full:CapitalCommitments
411 Increase (decrease) in number of shares outstanding Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
412 Increase (decrease) in number of non-flow-through units outstanding Concept (Shares) For Period avl:IncreaseDecreaseInNumberOfNonFlowThroughUnitsOutstanding
413 Proceeds from issuing shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingShares
414 147 - Disclosure - Exploration and Evaluation Assets (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfExplorationAndEvaluationAssetsExplanatoryDetails
415 Statement [Table] Table

*

*

 avl:StatementTable
416 Exploration and Evaluation Assets [Axis] Axis avl:ExplorationAndEvaluationAssetsAxis
417 Exploration and Evaluation Assets [Domain] Member ifrs-full:ExplorationAndEvaluationAssetsMember
418 Separation Rapids Lithium Project [Member] Member avl:SeparationRapidsLithiumProjectMember
419 Warren Township Anorthosite Project [Member] Member avl:WarrenTownshipAnorthositeProjectMember
420 Mount Douglas Tin-Tungsten Property [Member] Member avl:MountDouglasTintungstenPropertyMember
421 Lilypad Lakes Tantalum Property [Member] Member avl:LilypadLakesTantalumPropertyMember
422 East Cedartree Gold Property [Member] Member avl:EastCedartreeGoldPropertyMember
423 Wolf Mountain Platinum-Palladium Project [Member] Member avl:WolfMountainPlatinumpalladiumProjectMember
424 St. George, New Brunswick [Member] Member avl:StGeorgeNewBrunswickMember
425 York County, New Brunswick [Member] Member avl:YorkCountyNewBrunswickMember
426 Legal Entity [Axis] Axis dei:LegalEntityAxis
427 Entity [Domain] Member dei:EntityDomain
428 Statement [Line Items] LineItems avl:StatementLineItems
429 Ownership percentage of mineral properties Concept (Percent) As Of avl:OwnershipPercentageOfMineralProperties
430 Shares Issue for other considerations Concept (Shares) For Period avl:IncreaseThroughIssueOfSharesForOtherConsiderations
431 Equity issuance, price per share Concept (Share) For Period avl:EquityIssuancePricePerShare
432 Capital commitments Concept (Monetary) As Of Credit ifrs-full:CapitalCommitments
433 Expenditures Concept (Monetary) For Period Debit ifrs-full:ExpenseArisingFromExplorationForAndEvaluationOfMineralResources
434 Net smelter royalty percentage Concept (Percent) As Of avl:NetSmelterRoyaltyPercentage
435 Net smelter royalty, repurchase price Concept (Monetary) As Of Debit avl:NetSmelterRoyaltyRepurchasePrice
436 Impairment Loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
437 Exploration and evaluation assets Concept (Monetary) As Of Debit ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
438 148 - Disclosure - Property, Plant and Equipment (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfPropertyPlantAndEquipmentExplanatoryDetails
439 Statement [Table] Table

*

*

 avl:StatementTable
440 Classes of property, plant and equipment [Axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
441 Property, plant and equipment [Domain] Member ifrs-full:PropertyPlantAndEquipmentMember
442 Nechalacho REE Project [Member] Member avl:NechalachoReeProjectMember
443 Legal Entity [Axis] Axis dei:LegalEntityAxis
444 Entity [Domain] Member dei:EntityDomain
445 Statement [Line Items] LineItems avl:StatementLineItems
446 Ownership percentage of mineral properties Concept (Percent) As Of avl:OwnershipPercentageOfMineralProperties
447 Net smelter royalty percentage Concept (Percent) As Of avl:NetSmelterRoyaltyPercentage
448 Net smelter royalty, repurchase price Concept (Monetary) As Of Debit avl:NetSmelterRoyaltyRepurchasePrice
449 Shares Issue for other considerations Concept (Shares) For Period avl:IncreaseThroughIssueOfSharesForOtherConsiderations
450 Number of warrants granted Concept (Decimal) For Period avl:NumberOfWarrantsGranted
451 149 - Disclosure - Convertible Redeemable Preferred Shares (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfConvertibleRedeemablePreferredSharesExplanatoryTextBlockDetails
452 Statement [Table] Table

*

*

 avl:StatementTable
453 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
454 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
455 Series A1 Preferred Shares [Member] Member ifrs-full:PreferenceSharesMember
456 A1 Warrants [Member] Member avl:AOneWarrantsMember
457 Series A2 Preferred Shares [Member] Member avl:SeriesATwoPreferredSharesMember
458 Series A1 Preferred Shares and A1 warrants [Member] Member avl:SeriesAOnePreferredSharesAndAOneWarrantsMember
459 Series B1 Preferred Shares [Member] Member avl:SeriesBOnePreferredSharesMember
460 B1 Warrants [Member] Member avl:BOneWarrantsMember
461 Series B2 Preferred Shares [Member] Member avl:SeriesBTwoPreferredSharesMember
462 Series B1 Preferred Shares and B1 warrants [Member] Member avl:SeriesBOnePreferredSharesAndBOneWarrantsMember
463 Series C1 Preferred Shares [Member] Member avl:SeriesCOnePreferredSharesMember
464 C1 Warrants [Member] Member avl:COneWarrantsMember
465 Series C2 Preferred Shares [Member] Member avl:SeriesCTwoPreferredSharesMember
466 Series C1 Preferred Shares and C1 warrants [Member] Member avl:SeriesCOnePreferredSharesAndCOneWarrantsMember
467 A1, B1 and C1 Preferred Shares [Member] Member avl:AOneBOneAndCOnePreferredSharesMember
468 Range [Axis] Axis ifrs-full:RangeAxis
469 Ranges [Domain] Member ifrs-full:RangesMember
470 Bottom of range [Member] Member ifrs-full:BottomOfRangeMember
471 Top of range [Member] Member ifrs-full:TopOfRangeMember
472 Legal Entity [Axis] Axis dei:LegalEntityAxis
473 Entity [Domain] Member dei:EntityDomain
474 Statement [Line Items] LineItems avl:StatementLineItems
475 Increase (decrease) in number of shares outstanding Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
476 Equity issuance, price per share Concept (Share) For Period avl:EquityIssuancePricePerShare
477 Proceeds from issue of preference shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfPreferenceShares
478 Preferred shares, redemption value Concept (Monetary) As Of Credit avl:PreferredSharesRedemptionValue
479 Preferred shares, redemption value, increase per quarter Concept (Monetary) As Of Credit avl:PreferredSharesRedemptionValueIncreasePerQuarter
480 Payments for finder/broker fees, commissions and commitment fees Concept (Monetary) For Period Credit avl:PaymentsForFinderBrokerFeesCommissionsAndCommitmentFees
481 Payments for other issuance costs Concept (Monetary) For Period Credit ifrs-full:PaymentsForShareIssueCosts
482 Number of warrants issued Concept (Decimal) For Period avl:NumberOfWarrantsIssued
483 Weighted average exercise price of warrants issued Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsIssued
484 Number of shares authorised Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
485 Fair value of Preferred Shares Concept (Monetary) For Period Credit avl:FairValueOfPreferredShares
486 Fair value of warrants issued Concept (Monetary) For Period Credit avl:FairValueOfWarrantsIssued
487 Fair value (per warrant) of warrants issued Concept (Monetary) For Period Credit avl:FairValuePerWarrantOfWarrantsIssued
488 Expected dividend yield, warrants Concept (Monetary) For Period Credit avl:ExpectedDividendYieldWarrants
489 Risk free interest rate, warrants Concept (Percent) For Period avl:RiskFreeInterestRateWarrants
490 Expected life, warrants Concept (xbrli:durationItemType) For Period avl:ExpectedLifeWarrants
491 Expected volatility, warrants Concept (Percent) For Period avl:ExpectedVolatilityWarrants
492 Financing transaction costs Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
493 Fair values of the Preferred Shares and warrants at issuance Concept (Monetary) For Period Credit avl:FairValuesOfThePreferredSharesAndWarrantsAtIssuance
494 Excess of gross proceeds over fair values of the Preferred Shares and the warrants at issuance Concept (Monetary) For Period Debit avl:ExcessOfGrossProceedsOverFairValuesOfThePreferredSharesAndTheWarrantsAtIssuance
495 Dilutive effect of convertible instruments on number of ordinary shares Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
496 Weighted average share price Concept (Monetary) For Period ifrs-full:WeightedAverageSharePrice
497 150 - Disclosure - Derivative Liabilities (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDerivativeFinancialInstrumentsExplanatoryDetails
498 Statement [Table] Table

*

*

 avl:StatementTable
499 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
500 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
501 Warrants Denominated in Foreign Currency [Member] Member avl:WarrantsDenominatedInForeignCurrencyMember
502 Legal Entity [Axis] Axis dei:LegalEntityAxis
503 Entity [Domain] Member dei:EntityDomain
504 Statement [Line Items] LineItems avl:StatementLineItems
505 Derivative liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
506 151 - Disclosure - Site Closure and Reclamation Provision (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfSiteClosureAndReclamationProvisionExplanatoryTextBlockDetails
507 Statement [Table] Table

*

*

 avl:StatementTable
508 Components of Site Closure and Reclamation Provision [Axis] Axis avl:ComponentsOfSiteClosureAndReclamationProvisionAxis
509 Provision for decommissioning, restoration and rehabilitation costs [Domain] Member ifrs-full:ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
510 Thor Lake [Member] Member avl:ThorLakeMember
511 Separation Rapids [Member] Member avl:SeparationRapidsMember
512 Warren Township [Member] Member avl:WarrenTownshipMember
513 Legal Entity [Axis] Axis dei:LegalEntityAxis
514 Entity [Domain] Member dei:EntityDomain
515 Statement [Line Items] LineItems avl:StatementLineItems
516 Site closure and reclamation provisions Concept (Monetary) As Of Credit ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
517 Site closure and reclamation provisions, expected undiscounted future cash flow Concept (Monetary) As Of Credit avl:SiteClosureAndReclamationProvisionsExpectedUndiscountedFutureCashFlow
518 Expected inflation rate Concept (Percent) As Of avl:ExpectedInflationRate
519 152 - Disclosure - Share Capital (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfIssuedCapitalExplanatoryDetails
520 Statement [Table] Table

*

*

 avl:StatementTable
521 Warrants outstanding [Axis] Axis avl:WarrantsOutstandingAxis
522 Warrants outstanding [Domain] Member avl:WarrantsOutstandingDomain
523 Compensation warrants 1 [Member] Member avl:CompensationWarrantsOneMember
524 Compensation warrants 2 [Member] Member avl:CompensationWarrantsTwoMember
525 Compensation warrants 3 [Member] Member avl:CompensationWarrantsThreeMember
526 Compensation warrants 4 [Member] Member avl:CompensationWarrantsFourMember
527 Compensation warrants 5 [Member] Member avl:CompensationWarrantsFiveMember
528 Compensation warrants 6 [Member] Member avl:CompensationWarrantsSixMember
529 Equity transactions [Axis] Axis avl:EquityTransactionsAxis
530 Equity transactions [Domain] Member avl:EquityTransactionsDomain
531 Sales Agreement [Member] Member avl:SalesAgreementMember
532 First Supplement [Member] Member avl:FirstSupplementMember
533 December 2014 Private Placement [Member] Member avl:DecemberTwoZeroOneFourPrivatePlacementMember
534 Prospectus Offering [Member] Member avl:ProspectusOfferingMember
535 December 2015 Private Placement [Member] Member avl:DecemberTwoZeroOneFivePrivatePlacementMember
536 Private Placement [Member] Member avl:PrivatePlacementMember
537 March 2016 Private Placement [Member] Member avl:MarchTwoZeroOneSixPrivatePlacementMember
538 November 2016 Private Placement [Member] Member avl:NovemberTwoZeroOneSixPrivatePlacementMember
539 December 2016 Private Placement [Member] Member avl:DecemberTwoZeroOneSixPrivatePlacementMember
540 June 2017 Private Placement [Member] Member avl:JuneTwoZeroOneSevenPrivatePlacementMember
541 August 2017 Private Placement [Member] Member avl:AugustTwoZeroOneSevenPrivatePlacementMember
542 November 2017 Private Placement [Member] Member avl:NovemberTwoZeroOneSevenPrivatePlacementMember
543 December 2017 Private Placement [Member] Member avl:DecemberTwoZeroOneSevenPrivatePlacementMember
544 July 2018 Private Placement [Member] Member avl:JulyTwoZeroOneEightPrivatePlacementMember
545 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
546 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
547 Preferred shares [Member] Member avl:PreferredSharesMember
548 Flow-through common shares [Member] Member avl:FlowthroughCommonSharesMember
549 Finders compensation warrants [Member] Member avl:FindersCompensationWarrantsMember
550 Non-transferrable compensation warrants [Member] Member avl:NontransferrableCompensationWarrantsMember
551 FT Unit [Member] Member avl:FTUnitMember
552 Non-FT Unit [Member] Member avl:NonFTUnitMember
553 Warrants Denominated in Foreign Currency [Member] Member avl:WarrantsDenominatedInForeignCurrencyMember
554 A1 Warrants [Member] Member avl:AOneWarrantsMember
555 B1 Warrants [Member] Member avl:BOneWarrantsMember
556 C1 Warrants [Member] Member avl:COneWarrantsMember
557 Brokers Compensation Warrants Denominated in Foreign Currency [Member] Member avl:BrokersCompensationWarrantsDenominatedInForeignCurrencyMember
558 Categories of related parties [Axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
559 Related parties [Domain] Member ifrs-full:RelatedPartiesMember
560 Mr. Donald Bubar [Member] Member avl:MrDonaldBubarMember
561 Certain directors and officers [Member] Member avl:CertainDirectorsAndOfficersMember
562 Legal Entity [Axis] Axis dei:LegalEntityAxis
563 Entity [Domain] Member dei:EntityDomain
564 Statement [Line Items] LineItems avl:StatementLineItems
565 Number of shares authorised Concept (Shares) As Of ifrs-full:NumberOfSharesAuthorised
566 Number of shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
567 Number of shares outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
568 Value of shares authorised Concept (Monetary) As Of Credit avl:ValueOfSharesAuthorised
569 Percentage of Commission, or discount, of gross proceeds of shares sold Concept (Percent) As Of avl:PercentageOfCommissionOrDiscountOfGrossProceedsOfSharesSold
570 Increase (decrease) in number of shares outstanding Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
571 Equity issuance, price per share Concept (Share) For Period avl:EquityIssuancePricePerShare
572 Proceeds from issuing shares Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingShares
573 Payments for finder/broker fees, commissions and commitment fees Concept (Monetary) For Period Credit avl:PaymentsForFinderBrokerFeesCommissionsAndCommitmentFees
574 Payments for other issuance costs Concept (Monetary) For Period Credit ifrs-full:PaymentsForShareIssueCosts
575 Share issuance costs Concept (Monetary) For Period Debit avl:ShareIssuanceCosts
576 Prepaid transaction costs Concept (Monetary) As Of Debit avl:PrepaidTransactionCosts
577 Number of warrants issued Concept (Decimal) For Period avl:NumberOfWarrantsIssued
578 Weighted average exercise price of warrants issued Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsIssued
579 Fair value of warrants issued Concept (Monetary) For Period Credit avl:FairValueOfWarrantsIssued
580 Expected dividend yield, warrants Concept (Monetary) For Period Credit avl:ExpectedDividendYieldWarrants
581 Risk free interest rate, warrants Concept (Percent) For Period avl:RiskFreeInterestRateWarrants
582 Expected life, warrants Concept (xbrli:durationItemType) For Period avl:ExpectedLifeWarrants
583 Expected volatility, warrants Concept (Percent) For Period avl:ExpectedVolatilityWarrants
584 Deferred flow-through share premium Concept (Monetary) As Of Credit avl:DeferredFlowThroughSharePremium
585 Canadian exploration expenses Concept (Monetary) For Period Debit avl:CanadianExplorationExpenses
586 Canadian exploration expenses, balance Concept (Monetary) As Of Credit avl:CanadianExplorationExpensesBalance
587 Deferred Income Tax Recoveries Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
588 Number of units issued in an equity offering Concept (Decimal) For Period avl:NumberOfUnitsIssuedInAnEquityOffering
589 Equity Issuance, Price per Unit Concept (Share) For Period avl:EquityIssuancePricePerUnit
590 Proceeds from issuance of units Concept (Monetary) For Period Debit avl:ProceedsFromIssuanceOfUnits
591 Fair value of the warrant component of the Unit Concept (Monetary) For Period Credit avl:FairValueOfTheWarrantComponentOfTheUnit
592 Unit Price allocated to the share component Concept (Share) For Period avl:UnitPriceAllocatedToTheShareComponent
593 Unit Price allocated to the warrant component Concept (Share) For Period avl:UnitPriceAllocatedToTheWarrantComponent
594 Cash issuance costs allocated to warrants Concept (Monetary) For Period Debit avl:CashIssuanceCostsAllocatedToWarrants
595 Value of compensation warrants allocated to warrants Concept (Monetary) For Period Credit avl:ValueOfCompensationWarrantsAllocatedToWarrants
596 Cash issuance costs allocated to common shares Concept (Monetary) For Period Credit avl:CashIssuanceCostsAllocatedToCommonShares
597 Value of compensation warrants allocated to common shares Concept (Monetary) For Period Credit avl:ValueOfCompensationWarrantsAllocatedToCommonShares
598 Fair value of flow-through feature of the Flow-Through Unit Concept (Monetary) For Period Credit avl:FairValueOfFlowThroughFeatureOfTheFlowThroughUnit
599 Flow-Through Unit price allocated to share component Concept (Share) For Period avl:FlowThroughUnitPriceAllocatedToShareComponent
600 Flow-Through Unit price allocated to warrant component Concept (Share) For Period avl:FlowThroughUnitPriceAllocatedToWarrantComponent
601 Flow-Through Unit price allocated to flow-through feature Concept (Share) For Period avl:FlowThroughUnitPriceAllocatedToFlowThroughFeature
602 Canadian exploration expenses amount to be renounced per Flow-Through Unit Concept (Share) For Period avl:CanadianExplorationExpensesAmountToBeRenouncedPerFlowThroughUnit
603 Applicable tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
604 Share price Concept (Share) As Of avl:SharePrice
605 Fair value of warrants issued, value per warrant Concept (Share) For Period avl:FairValueOfWarrantsIssuedValuePerWarrant
606 Number of warrants outstanding Concept (Decimal) As Of avl:NumberOfOutstandingWarrants
607 Weighted average remaining contractual life of outstanding warrants Concept (Decimal) As Of avl:WeightedAverageRemainingContractualLifeOfOutstandingWarrants
608 Adjusted exercise price as calculated by the anti-dilution provisions of warrants issued in a financing transaction Concept (Monetary) As Of Credit avl:AdjustedExercisePriceAsCalculatedByTheAntiDilutionProvisionsOfWarrantsIssuedInAFinancingTransaction
609 Weighted average exercise price of warrants outstanding Concept (Monetary) As Of Credit avl:WeightedAverageExercisePriceOfWarrantsOutstandingInSharebasedPaymentArrangement
610 Warrants required to be issued Concept (Decimal) As Of avl:WarrantsRequiredToBeIssued
611 Warrants required to be issued, warrants per installment Concept (Decimal) As Of avl:WarrantsRequiredToBeIssuedWarrantsPerInstallment
612 Share options authorised as a percentage of number of issued and outstanding common shares Concept (Percent) As Of avl:ShareOptionsAuthorisedAsAPercentageOfNumberOfIssuedAndOutstandingCommonShares
613 Maximum vesting period for share options Concept (xbrli:durationItemType) For Period avl:MaximumVestingPeriodForShareOptions
614 Number of share options exercisable in share-based payment arrangement Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
615 Exercisable options, weighted average exercise price Concept (Monetary) As Of Credit avl:ExercisableOptionsWeightedAverageExercisePrice
616 Number of share options exercised in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
617 Weighted average exercise price of share options exercised in share-based payment arrangement Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
618 Weighted average closing market share price of share options exercised in share-based payment arrangement Concept (Monetary) For Period Credit avl:WeightedAverageClosingMarketSharePriceOfShareOptionsExercisedInShareBasedPaymentArrangement
619 Estimated fair value of options earned Concept (Monetary) For Period Credit avl:EstimatedFairValueOfOptionsEarned
620 Estimated fair value of options earned capitalized to property, plant and equipment Concept (Monetary) For Period Credit avl:EstimatedFairValueOfOptionsEarnedCapitalizedToPropertyPlantAndEquipment
621 Estimated fair value of options earned capitalized as exploration and evaluation assets Concept (Monetary) For Period Credit avl:EstimatedFairValueOfOptionsEarnedCapitalizedAsExplorationAndEvaluationAssets
622 Estimated fair value of options earned charged to operations as general exploration expenses Concept (Monetary) For Period Credit avl:EstimatedFairValueOfOptionsEarnedChargedToOperationsAsGeneralExplorationExpenses
623 Estimated fair value of options earned charged to operations as share based compensation expense Concept (Monetary) For Period Credit avl:EstimatedFairValueOfOptionsEarnedChargedToOperationsAsShareBasedCompensationExpense
624 153 - Disclosure - Corporate and Administrative Expenses (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfGeneralAndAdministrativeExpenseExplanatoryDetails
625 Statement [Table] Table

*

*

 avl:StatementTable
626 Legal Entity [Axis] Axis dei:LegalEntityAxis
627 Entity [Domain] Member dei:EntityDomain
628 Statement [Line Items] LineItems avl:StatementLineItems
629 Employees salaries, benefits and share based compensation Concept (Monetary) For Period Debit avl:EmployeesSalariesBenefitsAndShareBasedCompensation
630 155 - Disclosure - Related Party Disclosures (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfRelatedPartyExplanatoryDetails
631 Statement [Table] Table

*

*

 avl:StatementTable
632 Categories of related parties transactions [Axis] Axis avl:CategoriesOfRelatedPartiesTransactionsAxis
633 Categories of related parties transactions [Domain] Member avl:CategoriesOfRelatedPartiesTransactionsDomain
634 Capitalized to exploration and evaluation assets and PPE [Member] Member avl:CapitalizedToExplorationAndEvaluationAssetsAndPropertyPlantAndEquipmentMember
635 Equity transactions [Axis] Axis avl:EquityTransactionsAxis
636 Equity transactions [Domain] Member avl:EquityTransactionsDomain
637 Private Placement [Member] Member avl:PrivatePlacementMember
638 November 2017 Private Placement [Member] Member avl:NovemberTwoZeroOneSevenPrivatePlacementMember
639 Categories of related parties [Axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
640 Related parties [Domain] Member ifrs-full:RelatedPartiesMember
641 Mr. Donald Bubar [Member] Member avl:MrDonaldBubarMember
642 Mark Wiseman [Member] Member avl:MarkWisemanMember
643 Patricia Mohr [Member] Member avl:PatriciaMohrMember
644 Legal Entity [Axis] Axis dei:LegalEntityAxis
645 Entity [Domain] Member dei:EntityDomain
646 Statement [Line Items] LineItems avl:StatementLineItems
647 Number of units issued in an equity offering Concept (Decimal) For Period avl:NumberOfUnitsIssuedInAnEquityOffering
648 Equity Issuance, Price per Unit Concept (Share) For Period avl:EquityIssuancePricePerUnit
649 Increase (decrease) in number of shares outstanding Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
650 Equity issuance, price per share Concept (Share) For Period avl:EquityIssuancePricePerShare
651 Salaries, benefits and directors fees Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
652 156 - Disclosure - Financial Instruments (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfFinancialInstrumentsExplanatoryDetails
653 Statement [Table] Table

*

*

 avl:StatementTable
654 Legal Entity [Axis] Axis dei:LegalEntityAxis
655 Entity [Domain] Member dei:EntityDomain
656 Statement [Line Items] LineItems avl:StatementLineItems
657 Preferred shares, redemption premium Concept (Percent) As Of avl:PreferredSharesRedemptionPremium
658 Total Current Assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
659 Total Current Liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
660 Preferred shares, applicable redemption value Concept (Monetary) As Of Credit avl:PreferredSharesApplicableRedemptionValue
661 Deferred flow-through share premium Concept (Monetary) As Of Credit avl:DeferredFlowThroughSharePremium
662 Warrants denominated in foreign currency Concept (Monetary) As Of Credit avl:WarrantsDenominatedInForeignCurrency
663 Adjusted working capital deficit Concept (Monetary) As Of Debit avl:AdjustedWorkingCapital
664 Working capital deficit Concept (Monetary) As Of Debit avl:WorkingCapital
665 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
666 Anticipated on-going expenditures to be transacted in US dollars for the next twelve month period Concept (Monetary) For Period Debit avl:AnticipatedOnGoingExpendituresToBeTransactedInUSDollarsForTheNextTwelveMonthPeriod
667 157 - Disclosure - Income Taxes (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfIncomeTaxExplanatoryDetails
668 Statement [Table] Table

*

*

 avl:StatementTable
669 Temporary difference, unused tax losses and unused tax credits [Axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
670 Temporary difference, unused tax losses and unused tax credits [Domain] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
671 Non-capital losses carried forward [Member] Member avl:NoncapitalLossesCarriedForwardMember
672 Net operating losses [Member] Member avl:NetOperatingLossesMember
673 Capital losses carried forward [Member] Member avl:CapitalLossesCarriedForwardMember
674 Legal Entity [Axis] Axis dei:LegalEntityAxis
675 Entity [Domain] Member dei:EntityDomain
676 Statement [Line Items] LineItems avl:StatementLineItems
677 Unused tax credits for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised
678 Unused tax losses for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
679 158 - Disclosure - Loss per Share (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfEarningsPerShareExplanatoryDetails
680 Statement [Table] Table

*

*

 avl:StatementTable
681 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
682 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
683 A1, B1 and C1 Preferred Shares [Member] Member avl:AOneBOneAndCOnePreferredSharesMember
684 Legal Entity [Axis] Axis dei:LegalEntityAxis
685 Entity [Domain] Member dei:EntityDomain
686 Statement [Line Items] LineItems avl:StatementLineItems
687 Net Loss and Total Comprehensive Loss for the year Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
688 Number of warrants outstanding Concept (Decimal) As Of avl:NumberOfOutstandingWarrants
689 Number of share options outstanding in share-based payment arrangement Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
690 Number of convertible preferred shares outstanding Concept (Shares) As Of avl:NumberOfConvertiblePreferredSharesOutstanding
691 Dilutive effect of convertible instruments on number of ordinary shares Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
692 Market closing share price Concept (Monetary) As Of Credit avl:MarketClosingSharePrice
693 159 - Disclosure - Commitments (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfCommitmentsExplanatoryDetails
694 Statement [Table] Table

*

*

 avl:StatementTable
695 Commitments [Axis] Axis avl:CommitmentsAxis
696 Commitments [Domain] Member avl:CommitmentsDomain
697 Canadian exploration expenses [Member] Member avl:CanadianExplorationExpensesMember
698 Legal Entity [Axis] Axis dei:LegalEntityAxis
699 Entity [Domain] Member dei:EntityDomain
700 Statement [Line Items] LineItems avl:StatementLineItems
701 Capital commitments Concept (Monetary) As Of Credit ifrs-full:CapitalCommitments
702 160 - Disclosure - Events After the Reporting Period (Narrative) (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfEventsAfterReportingPeriodExplanatoryDetails
703 Statement [Table] Table

*

*

 avl:StatementTable
704 Non-adjusting events after reporting period [Axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
705 Non-adjusting events after reporting period [Domain] Member ifrs-full:NonadjustingEventsMember
706 Events After the Reporting Period [Member] Member avl:EventsAfterTheReportingPeriodMember
707 Events After the Reporting Period - Funding Agreement [Member] Member avl:EventsAfterTheReportingPeriodFundingAgreementMember
708 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
709 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
710 Series A1 Preferred Shares [Member] Member ifrs-full:PreferenceSharesMember
711 Series B1 Preferred Shares [Member] Member avl:SeriesBOnePreferredSharesMember
712 Series C1 Preferred Shares [Member] Member avl:SeriesCOnePreferredSharesMember
713 Brokers Compensation Warrants [Member] Member avl:BrokersCompensationWarrantsMember
714 Categories of related parties [Axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
715 Related parties [Domain] Member ifrs-full:RelatedPartiesMember
716 Mr. Donald Bubar [Member] Member avl:MrDonaldBubarMember
717 Legal Entity [Axis] Axis dei:LegalEntityAxis
718 Entity [Domain] Member dei:EntityDomain
719 Statement [Line Items] LineItems avl:StatementLineItems
720 Number of share options granted in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
721 Weighted average exercise price of share options granted in share-based payment arrangement Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
722 Weighted average remaining contractual life of outstanding share options Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
723 Conversion of redeemable preferred shares (Shares) Concept (Shares) For Period avl:IncreaseInNumberOfSharesOutstandinghroughConversionOfConvertibleInstruments
724 Converted to common shares (shares) Concept (Shares) For Period avl:ConvertedToCommonSharesShares
725 Number of share options expired in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement
726 Weighted average exercise price of share options expired in share-based payment arrangement Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement
727 Number of warrants expired Concept (Decimal) For Period avl:NumberOfWarrantsExpired
728 Weighted average exercise price of warrants expired Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsExpired
729 Number of units issued in an equity offering Concept (Decimal) For Period avl:NumberOfUnitsIssuedInAnEquityOffering
730 Equity Issuance, Price per Unit Concept (Share) For Period avl:EquityIssuancePricePerUnit
731 Proceeds from issuing units Concept (Monetary) For Period Debit avl:ProceedsFromIssuingUnits
732 Weighted average exercise price of warrants issued Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsIssued
733 Proceeds from non-current borrowings Concept (Monetary) For Period Debit ifrs-full:ProceedsFromNoncurrentBorrowings
734 Borrowings, interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
735 Payments for debt issue costs Concept (Monetary) For Period Credit ifrs-full:PaymentsForDebtIssueCosts
736 Number of warrants issued Concept (Decimal) For Period avl:NumberOfWarrantsIssued
737 Contractual term of warrants issued Concept (xbrli:durationItemType) For Period avl:ContractualTermOfWarrantsIssued
738 161 - Disclosure - Disclosure of detailed information about estimated useful life or depreciation rate (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutEstimatedUsefulLifeOrDepreciationRateExplanatoryTableTextBlockDetails
739 Statement [Table] Table

*

*

 avl:StatementTable
740 Classes of property, plant and equipment [Axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
741 Property, plant and equipment [Domain] Member ifrs-full:PropertyPlantAndEquipmentMember
742 Nechalacho REE Project [Member] Member avl:NechalachoReeProjectMember
743 Airstrip [Member] Member avl:AirstripMember
744 Building [Member] Member ifrs-full:BuildingsMember
745 Computer and office equipment [Member] Member ifrs-full:OfficeEquipmentMember
746 Land and Building [Member] Member ifrs-full:LandAndBuildingsMember
747 Exploration equipment [Member] Member avl:ExplorationEquipmentMember
748 Leasehold improvements [Member] Member ifrs-full:LeaseholdImprovementsMember
749 Legal Entity [Axis] Axis dei:LegalEntityAxis
750 Entity [Domain] Member dei:EntityDomain
751 Statement [Line Items] LineItems avl:StatementLineItems
752 Useful lives or depreciation rates, property, plant and equipment Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
753 162 - Disclosure - Disclosure of detailed information about cash and cash equivalents (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutCashAndCashEquivalentsExplanatoryDetails
754 Statement [Table] Table

*

*

 avl:StatementTable
755 Legal Entity [Axis] Axis dei:LegalEntityAxis
756 Entity [Domain] Member dei:EntityDomain
757 Statement [Line Items] LineItems avl:StatementLineItems
758 Cash held in bank accounts Concept (Monetary) As Of Debit ifrs-full:BalancesWithBanks
759 Guaranteed investment certificates Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
760 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
761 163 - Disclosure - Disclosure of detailed information about exploration and evaluation assets (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutExplorationAndEvaluationAssetsExplanatoryTableTextBlockDetails
762 Statement [Table] Table

*

*

 avl:StatementTable
763 Exploration and Evaluation Assets [Axis] Axis avl:ExplorationAndEvaluationAssetsAxis
764 Exploration and Evaluation Assets [Domain] Member ifrs-full:ExplorationAndEvaluationAssetsMember
765 Separation Rapids Lithium Project [Member] Member avl:SeparationRapidsLithiumProjectMember
766 East Kemptville Tin-Indium Project [Member] Member avl:EastKemptvilleTinindiumProjectMember
767 Warren Township Anorthosite Project [Member] Member avl:WarrenTownshipAnorthositeProjectMember
768 Mount Douglas Tin-Tungsten Property [Member] Member avl:MountDouglasTintungstenPropertyMember
769 Other [Member] Member avl:OtherExplorationAndEvaluationAssetsMember
770 Legal Entity [Axis] Axis dei:LegalEntityAxis
771 Entity [Domain] Member dei:EntityDomain
772 Statement [Line Items] LineItems avl:StatementLineItems
773 Exploration and evaluation assets, beginning of period Concept (Monetary) As Of Debit ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
774 Expenditures Concept (Monetary) For Period Debit ifrs-full:ExpenseArisingFromExplorationForAndEvaluationOfMineralResources
775 Impairment Loss Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
776 Exploration and evaluation assets, end of period Concept (Monetary) As Of Debit ifrs-full:AssetsArisingFromExplorationForAndEvaluationOfMineralResources
777 164 - Disclosure - Disclosure of detailed information about property, plant and equipment (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatoryDetails
778 Statement [Table] Table

*

*

 avl:StatementTable
779 Classes of property, plant and equipment [Axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
780 Property, plant and equipment [Domain] Member ifrs-full:PropertyPlantAndEquipmentMember
781 Nechalacho REE Project [Member] Member avl:NechalachoReeProjectMember
782 Airstrip [Member] Member avl:AirstripMember
783 Computer and office equipment [Member] Member ifrs-full:OfficeEquipmentMember
784 Land and Building [Member] Member ifrs-full:LandAndBuildingsMember
785 Exploration equipment [Member] Member avl:ExplorationEquipmentMember
786 Leasehold improvements [Member] Member ifrs-full:LeaseholdImprovementsMember
787 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [Axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
788 Carrying amount [Domain] Member ifrs-full:CarryingAmountMember
789 Cost [Member] Member ifrs-full:GrossCarryingAmountMember
790 Accumulated Depreciation [Member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
791 Legal Entity [Axis] Axis dei:LegalEntityAxis
792 Entity [Domain] Member dei:EntityDomain
793 Statement [Line Items] LineItems avl:StatementLineItems
794 Property, plant and equipment at beginning of period Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
795 Additions Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
796 Depreciation expense Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
797 Disposals Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
798 Property, plant and equipment at end of period Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
799 165 - Disclosure - Disclosure of detailed information about deferred flow-through share premium (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutDeferredFlowthroughSharePremiumExplanatoryTableTextBlockDetails
800 Statement [Table] Table

*

*

 avl:StatementTable
801 Legal Entity [Axis] Axis dei:LegalEntityAxis
802 Entity [Domain] Member dei:EntityDomain
803 Statement [Line Items] LineItems avl:StatementLineItems
804 Deferred flow-through share premium, beginning of period Concept (Monetary) As Of Credit avl:DeferredFlowThroughSharePremium
805 Increase relating to flow-through common shares issued Concept (Monetary) For Period Credit avl:IncreaseRelatingToFlowThroughCommonSharesIssued
806 Decrease relating to CEE incurred Concept (Monetary) For Period Debit avl:DecreaseRelatingToCEEIncurred
807 Deferred flow-through share premium, end of period Concept (Monetary) As Of Credit avl:DeferredFlowThroughSharePremium
808 166 - Disclosure - Disclosure of detailed information about convertible redeemable preferred shares (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutConvertibleRedeemablePreferredSharesExplanatoryTableTextBlockDetails
809 Statement [Table] Table

*

*

 avl:StatementTable
810 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
811 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
812 Series A1 Preferred Shares [Member] Member ifrs-full:PreferenceSharesMember
813 Series B1 Preferred Shares [Member] Member avl:SeriesBOnePreferredSharesMember
814 Series C1 Preferred Shares [Member] Member avl:SeriesCOnePreferredSharesMember
815 A1, B1 and C1 Preferred Shares [Member] Member avl:AOneBOneAndCOnePreferredSharesMember
816 Legal Entity [Axis] Axis dei:LegalEntityAxis
817 Entity [Domain] Member dei:EntityDomain
818 Statement [Line Items] LineItems avl:StatementLineItems
819 Beginning Balance (Shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
820 Convertible redeemable preferred shares, beginning of period Concept (Monetary) As Of Credit avl:ConvertibleRedeemablePreferredShares
821 Increase (decrease) in number of shares outstanding Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfSharesOutstanding
822 Preferred shares issued Concept (Monetary) For Period Credit avl:FairValueOfPreferredShares
823 Increase in fair value of convertible redeemable preferred shares Concept (Monetary) For Period Debit avl:IncreaseDecreaseInFairValueOfConvertibleRedeemablePreferredShares
824 Converted to common shares (Shares) Concept (Shares) For Period avl:IncreaseDecreaseInNumberOfSharesOutstandinghroughConversionOfConvertibleInstruments
825 Converted to common shares Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments
826 Ending Balance (Shares) Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
827 Convertible redeemable preferred shares, end of period Concept (Monetary) As Of Credit avl:ConvertibleRedeemablePreferredShares
828 167 - Disclosure - Disclosure of detailed information about derivative liabilities (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutDerivativeLiabilitiesExplanatoryTableTextBlockDetails
829 Statement [Table] Table

*

*

 avl:StatementTable
830 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
831 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
832 Warrants Denominated in Foreign Currency [Member] Member avl:WarrantsDenominatedInForeignCurrencyMember
833 A1, B1 and C1 Warrants [Member] Member avl:AOneBOneAndCOneWarrantsMember
834 Legal Entity [Axis] Axis dei:LegalEntityAxis
835 Entity [Domain] Member dei:EntityDomain
836 Statement [Line Items] LineItems avl:StatementLineItems
837 Number of warrants outstanding at beginning of period Concept (Decimal) As Of avl:NumberOfOutstandingWarrants
838 Derivative liabilities, beginning of period Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
839 Number of warrants issued Concept (Decimal) For Period avl:NumberOfWarrantsIssued
840 Fair value of warrants issued Concept (Monetary) For Period Credit avl:FairValueOfWarrantsIssued
841 Decrease in fair value of derivative liabilities Concept (Monetary) For Period Credit ifrs-full:GainsLossesOnChangeInFairValueOfDerivatives
842 Number of warrants outstanding at end of period Concept (Decimal) As Of avl:NumberOfOutstandingWarrants
843 Derivative liabilities, end of period Concept (Monetary) As Of Credit ifrs-full:NoncurrentDerivativeFinancialLiabilities
844 168 - Disclosure - Disclosure of detailed information about site closure and reclamation provision (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutSiteClosureAndReclamationProvisionExplanatoryTableTextBlockDetails
845 Statement [Table] Table

*

*

 avl:StatementTable
846 Legal Entity [Axis] Axis dei:LegalEntityAxis
847 Entity [Domain] Member dei:EntityDomain
848 Statement [Line Items] LineItems avl:StatementLineItems
849 Site closure and reclamation provisions, beginning of period Concept (Monetary) As Of Credit ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
850 Increase in provision for site closure and reclamation costs Concept (Monetary) For Period Credit avl:IncreaseInProvisionForSiteClosureAndReclamationCosts
851 Site closure and reclamation provisions, end of period Concept (Monetary) As Of Credit ifrs-full:LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
852 169 - Disclosure - Disclosure of number and weighted average exercise prices of warrants (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfNumberAndWeightedAverageExercisePricesOfWarrantsExplanatoryTableTextBlockDetails
853 Statement [Table] Table

*

*

 avl:StatementTable
854 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
855 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
856 Excluding US$ Warrants, A1, B1, and C1 Warrants [Member] Member avl:ExcludingUsWarrantsAOneBOneAndCOneWarrantsMember
857 Issued pursuant to equity offerings [Member] Member avl:IssuedPursuantToEquityOfferingsMember
858 Issued pursuant to Accommodation Agreement [Member] Member avl:IssuedPursuantToAccommodationAgreementMember
859 Legal Entity [Axis] Axis dei:LegalEntityAxis
860 Entity [Domain] Member dei:EntityDomain
861 Statement [Line Items] LineItems avl:StatementLineItems
862 Number of warrants outstanding at beginning of period Concept (Decimal) As Of avl:NumberOfOutstandingWarrants
863 Weighted average exercise price of warrants outstanding at beginning of period Concept (Monetary) As Of Credit avl:WeightedAverageExercisePriceOfWarrantsOutstanding
864 Number of warrants issued Concept (Decimal) For Period avl:NumberOfWarrantsIssued
865 Weighted average exercise price of warrants issued Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsIssued
866 Number of warrants exercised Concept (Decimal) For Period avl:NumberOfWarrantsExercised
867 Weighted average exercise price of warrants exercised Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsExercised
868 Number of warrants expired Concept (Decimal) For Period avl:NumberOfWarrantsExpired
869 Weighted average exercise price of warrants expired Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsExpired
870 Number of warrants outstanding at end of period Concept (Decimal) As Of avl:NumberOfOutstandingWarrants
871 Weighted average exercise price of warrants outstanding at end of period Concept (Monetary) As Of Credit avl:WeightedAverageExercisePriceOfWarrantsOutstanding
872 170 - Disclosure - Disclosure of number and weighted average exercise prices of share options (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatoryDetails
873 Statement [Table] Table

*

*

 avl:StatementTable
874 Legal Entity [Axis] Axis dei:LegalEntityAxis
875 Entity [Domain] Member dei:EntityDomain
876 Statement [Line Items] LineItems avl:StatementLineItems
877 Number of share options outstanding in share-based payment arrangement at beginning of period Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
878 Weighted average exercise price of share options outstanding in share-based payment arrangement at beginning of period Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
879 Number of share options granted in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
880 Weighted average exercise price of share options granted in share-based payment arrangement Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
881 Number of share options exercised in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
882 Weighted average exercise price of share options exercised in share-based payment arrangement Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
883 Number of share options expired in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExpiredInSharebasedPaymentArrangement
884 Weighted average exercise price of share options expired in share-based payment arrangement Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExpiredInSharebasedPaymentArrangement
885 Number of share options forfeited in share-based payment arrangement Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
886 Weighted average exercise price of share options forfeited in share-based payment arrangement Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
887 Number of share options outstanding in share-based payment arrangement at end of period Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
888 Weighted average exercise price of share options outstanding in share-based payment arrangement at end of period Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
889 171 - Disclosure - Disclosure of detailed information about options, valuation assumptions (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutOptionsValuationAssumptionsExplanatoryDetails
890 Statement [Table] Table

*

*

 avl:StatementTable
891 Legal Entity [Axis] Axis dei:LegalEntityAxis
892 Entity [Domain] Member dei:EntityDomain
893 Statement [Line Items] LineItems avl:StatementLineItems
894 Exercise price Concept (Monetary) For Period ifrs-full:ExercisePriceShareOptionsGranted
895 Closing market price on day preceding date of grant Concept (Monetary) For Period Credit avl:ClosingMarketPriceOnDayPrecedingDateOfGrantShareOptionsGranted
896 Risk-free interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
897 Expected life (years) Concept (Decimal) For Period ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
898 Expected volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
899 Expected dividend yield Concept (Monetary) For Period ifrs-full:ExpectedDividendShareOptionsGranted
900 Grant date fair value Concept (Monetary) For Period ifrs-full:WeightedAverageSharePriceShareOptionsGranted
901 Forfeiture rate Concept (Percent) For Period avl:DescriptionOfExpectedForfeitureRateShareOptionsGranted
902 172 - Disclosure - Disclosure of range of exercise prices of outstanding share options (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatoryDetails
903 Statement [Table] Table

*

*

 avl:StatementTable
904 Ranges of exercise prices for outstanding share options [Axis] Axis ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
905 Ranges of exercise prices for outstanding share options [Domain] Member ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
906 Exercise Price Range 1 [Member] Member avl:ExercisePriceRangeOneMember
907 Exercise Price Range 2 [Member] Member avl:ExercisePriceRangeTwoMember
908 Exercise Price Range 3 [Member] Member avl:ExercisePriceRangeThreeMember
909 Exercise Price Range 4 [Member] Member avl:ExercisePriceRangeFourMember
910 Exercise Price Range 5 [Member] Member avl:ExercisePriceRangeFiveMember
911 Range [Axis] Axis ifrs-full:RangeAxis
912 Ranges [Domain] Member ifrs-full:RangesMember
913 Bottom of range [Member] Member ifrs-full:BottomOfRangeMember
914 Top of range [Member] Member ifrs-full:TopOfRangeMember
915 Legal Entity [Axis] Axis dei:LegalEntityAxis
916 Entity [Domain] Member dei:EntityDomain
917 Statement [Line Items] LineItems avl:StatementLineItems
918 Exercise Price Range Concept (Monetary) As Of ifrs-full:ExercisePriceOfOutstandingShareOptions
919 Number of Options Outstanding Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
920 Number of Options Exercisable Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
921 Weighted average remaining contractual life of outstanding share options Concept (Decimal) As Of ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
922 173 - Disclosure - Disclosure of number and weighted average exercise prices of brokers compensation warrants (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfNumberAndWeightedAverageExercisePricesOfBrokersCompensationWarrantsExplanatoryTableTextBlockDetails
923 Statement [Table] Table

*

*

 avl:StatementTable
924 Classes of entity's own equity instruments [Axis] Axis ifrs-full:ClassesOfEntitysOwnEquityInstrumentsAxis
925 Entity's own equity instruments [Domain] Member ifrs-full:EntitysOwnEquityInstrumentsMember
926 Brokers Compensation Warrants [Member] Member avl:BrokersCompensationWarrantsMember
927 Legal Entity [Axis] Axis dei:LegalEntityAxis
928 Entity [Domain] Member dei:EntityDomain
929 Statement [Line Items] LineItems avl:StatementLineItems
930 Number of warrants outstanding in share-based payment arrangement at beginning of period Concept (Decimal) As Of avl:NumberOfOutstandingWarrantsInSharebasedPaymentArrangement
931 Weighted average exercise price of warrants outstanding in share-based payment arrangement at beginning of period Concept (Monetary) As Of Credit avl:WeightedAverageExercisePriceOfWarrantsOutstandingInSharebasedPaymentArrangement
932 Number of warrants granted in share-based payment arrangement Concept (Decimal) For Period avl:NumberOfWarrantsGrantedInSharebasedPaymentArrangement
933 Weighted average exercise price of warrants granted in share-based payment arrangement Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsGrantedInSharebasedPaymentArrangement
934 Number of warrants exercised in share-based payment arrangement Concept (Decimal) For Period avl:NumberOfWarrantsExercisedInSharebasedPaymentArrangement
935 Weighted average exercise price of warrants exercised in share-based payment arrangement Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsExercisedInSharebasedPaymentArrangement
936 Number of warrants expired in share-based payment arrangement Concept (Decimal) For Period avl:NumberOfWarrantsExpiredInSharebasedPaymentArrangement
937 Weighted average exercise price of warrants expired in share-based payment arrangement Concept (Monetary) For Period Credit avl:WeightedAverageExercisePriceOfWarrantsExpiredInSharebasedPaymentArrangement
938 Number of warrants outstanding in share-based payment arrangement at end of period Concept (Decimal) As Of avl:NumberOfOutstandingWarrantsInSharebasedPaymentArrangement
939 Weighted average exercise price of warrants outstanding in share-based payment arrangement at end of period Concept (Monetary) As Of Credit avl:WeightedAverageExercisePriceOfWarrantsOutstandingInSharebasedPaymentArrangement
940 174 - Disclosure - Disclosure of expenses by nature (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfExpensesByNatureExplanatoryDetails
941 Statement [Table] Table

*

*

 avl:StatementTable
942 Legal Entity [Axis] Axis dei:LegalEntityAxis
943 Entity [Domain] Member dei:EntityDomain
944 Statement [Line Items] LineItems avl:StatementLineItems
945 Salaries and benefits Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
946 Directors fees Concept (Monetary) For Period Debit ifrs-full:DirectorsRemunerationExpense
947 Consulting and professional fees Concept (Monetary) For Period Debit ifrs-full:ProfessionalFeesExpense
948 Office, insurance and other expenses Concept (Monetary) For Period Debit ifrs-full:MiscellaneousOtherOperatingExpense
949 Occupancy Concept (Monetary) For Period Debit ifrs-full:OccupancyExpense
950 Shareholders communications and filing fees Concept (Monetary) For Period Debit ifrs-full:CommunicationExpense
951 Travel and related costs Concept (Monetary) For Period Debit ifrs-full:TravelExpense
952 Corporate and administrative Concept (Monetary) For Period Debit ifrs-full:AdministrativeExpense
953 175 - Disclosure - Disclosure of information about key management personnel (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfInformationAboutKeyManagementPersonnelExplanatoryDetails
954 Statement [Table] Table

*

*

 avl:StatementTable
955 Legal Entity [Axis] Axis dei:LegalEntityAxis
956 Entity [Domain] Member dei:EntityDomain
957 Statement [Line Items] LineItems avl:StatementLineItems
958 Salaries, benefits and directors fees Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
959 Share based compensation Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
960 Compensation of key management personnel Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
961 176 - Disclosure - Disclosure of liquidity risk (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfLiquidityRiskExplanatoryDetails
962 Statement [Table] Table

*

*

 avl:StatementTable
963 Maturity [Axis] Axis ifrs-full:MaturityAxis
964 Aggregated time bands[Domain] Member ifrs-full:AggregatedTimeBandsMember
965 Over 5 Years [Member] Member ifrs-full:LaterThanFiveYearsMember
966 Within 1 Year [Member] Member ifrs-full:NotLaterThanOneYearMember
967 1-3 Years [Member] Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
968 4-5 Years [Member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
969 Legal Entity [Axis] Axis dei:LegalEntityAxis
970 Entity [Domain] Member dei:EntityDomain
971 Statement [Line Items] LineItems avl:StatementLineItems
972 Accounts payable and accrued liabilities Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
973 Operating lease obligations Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
974 Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
975 177 - Disclosure - Disclosure of detailed information about non cash financing and investing transactions (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutNonCashFinancingAndInvestingTransactionsExplanatoryTableTextBlockDetails
976 Statement [Table] Table

*

*

 avl:StatementTable
977 Legal Entity [Axis] Axis dei:LegalEntityAxis
978 Entity [Domain] Member dei:EntityDomain
979 Statement [Line Items] LineItems avl:StatementLineItems
980 Share based compensation capitalized as property, plant and equipment Concept (Monetary) For Period Credit avl:EstimatedFairValueOfOptionsEarnedCapitalizedToPropertyPlantAndEquipment
981 Share based compensation capitalized as exploration and evaluation assets Concept (Monetary) For Period Credit avl:EstimatedFairValueOfOptionsEarnedCapitalizedAsExplorationAndEvaluationAssets
982 Depreciation expense capitalized as property, plant and equipment Concept (Monetary) For Period Credit avl:DepreciationExpenseCapitalizedAsPropertyPlantAndEquipment
983 Depreciation expense capitalized as exploration and evaluation assets Concept (Monetary) For Period Credit avl:DepreciationExpenseCapitalizedAsExplorationAndEvaluationAssets
984 Warrants issued pursuant to the Accommodation Agreement and capitalized as property, plant and equipment Concept (Monetary) For Period Credit avl:WarrantsIssuedPursuantToTheAccommodationAgreementAndCapitalizedAsPropertyPlantAndEquipment
985 Common shares issued for exploration and evaluation assets Concept (Monetary) For Period Credit avl:CommonSharesIssuedForExplorationAndEvaluationAssets
986 Non-cash financing and investing transactions Concept (Monetary) For Period Credit avl:NonCashFinancingAndInvestingTransactions
987 178 - Disclosure - Disclosure of detailed information about effective income tax expense recovery (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutEffectiveIncomeTaxExpenseRecoveryExplanatoryDetails
988 Statement [Table] Table

*

*

 avl:StatementTable
989 Legal Entity [Axis] Axis dei:LegalEntityAxis
990 Entity [Domain] Member dei:EntityDomain
991 Statement [Line Items] LineItems avl:StatementLineItems
992 Net loss for the year before income taxes Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
993 Applicable tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
994 Expected income tax recovery at statutory rates Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
995 Share based compensation Concept (Monetary) For Period Debit avl:TaxEffectOfShareBasedCompensation
996 Non-deductible financing transaction costs Concept (Monetary) For Period Debit avl:TaxEffectOfNonDeductibleFinancingTransactionCosts
997 Other non-deductible expenses Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfExpenseNotDeductibleInDeterminingTaxableProfitTaxLoss
998 Non-allowable portion of capital loss Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfTaxLosses
999 Exploration expenditures to be renounced Concept (Monetary) For Period Debit avl:TaxEffectOfExplorationExpendituresToBeRenounced
1000 Non-taxable (non-deductible) change in fair value of financial instruments Concept (Monetary) For Period Debit avl:TaxEffectOfNonTaxableNonDeductibleChangeInFairValueOfFinancialInstruments
1001 Losses and other deductions for which no benefit has been recognized Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
1002 Deferred income tax recoveries Concept (Monetary) For Period Debit ifrs-full:DeferredTaxExpenseIncome
1003 179 - Disclosure - Disclosure of deferred taxes (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDeferredTaxesExplanatoryDetails
1004 Statement [Table] Table

*

*

 avl:StatementTable
1005 Components of deferred tax assets and liabilities [Axis] Axis avl:ComponentsOfDeferredTaxAssetsAndLiabilitiesAxis
1006 Components of deferred tax assets and liabilities [Domain] Member avl:ComponentsOfDeferredTaxAssetsAndLiabilitiesDomain
1007 Exploration and Evaluation Assets [Domain] Member ifrs-full:ExplorationAndEvaluationAssetsMember
1008 Scientific research and experimental developmental expenditures [Member] Member avl:ScientificResearchAndExperimentalDevelopmentalExpendituresMember
1009 Property, plant and equipment [Domain] Member ifrs-full:PropertyPlantAndEquipmentMember
1010 Legal Entity [Axis] Axis dei:LegalEntityAxis
1011 Entity [Domain] Member dei:EntityDomain
1012 Statement [Line Items] LineItems avl:StatementLineItems
1013 Deferred income tax assets Concept (Monetary) As Of Debit ifrs-full:DeferredTaxAssets
1014 Deferred income tax liabilities Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilities
1015 Net deferred income tax assets Concept (Monetary) As Of Debit ifrs-full:NetDeferredTaxAssets
1016 180 - Disclosure - Disclosure of temporary difference, unused tax losses and unused tax credits (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatoryDetails
1017 Statement [Table] Table

*

*

 avl:StatementTable
1018 Temporary difference, unused tax losses and unused tax credits [Axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1019 Temporary difference, unused tax losses and unused tax credits [Domain] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1020 Non-capital loss carryforwards [Member] Member avl:NoncapitalLossCarryforwardsMember
1021 Scientific research and experimental developmental expenditures [Member] Member avl:ScientificResearchAndExperimentalDevelopmentalExpendituresMember
1022 Share issuance costs [Member] Member avl:ShareIssuanceCostsMember
1023 Capital loss carry forwards [Member] Member avl:CapitalLossCarryForwardsMember
1024 Legal Entity [Axis] Axis dei:LegalEntityAxis
1025 Entity [Domain] Member dei:EntityDomain
1026 Statement [Line Items] LineItems avl:StatementLineItems
1027 Unused tax losses for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1028 Deductible temporary differences not recognized Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1029 181 - Disclosure - Disclosure of detailed information about non-capital losses (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutNoncapitalLossesExplanatoryTableTextBlockDetails
1030 Statement [Table] Table

*

*

 avl:StatementTable
1031 Temporary difference, unused tax losses and unused tax credits [Axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1032 Temporary difference, unused tax losses and unused tax credits [Domain] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1033 Non-capital losses carried forward [Member] Member avl:NoncapitalLossesCarriedForwardMember
1034 Expiration of losses carried forward [Axis] Axis avl:ExpirationOfLossesCarriedForwardAxis
1035 Expiration of losses carried forward [Domain] Member avl:ExpirationOfLossesCarriedForwardDomain
1036 2026 [Member] Member avl:TwoZeroTwoSixMember
1037 2027 [Member] Member avl:TwoZeroTwoSevenMember
1038 2028 [Member] Member avl:TwoZeroTwoEightMember
1039 2029 [Member] Member avl:TwoZeroTwoNineMember
1040 2030 [Member] Member avl:TwoZeroThreeZeroMember
1041 2031 [Member] Member avl:TwoZeroThreeOneMember
1042 2032 [Member] Member avl:TwoZeroThreeTwoMember
1043 2033 [Member] Member avl:TwoZeroThreeThreeMember
1044 2034 [Member] Member avl:TwoZeroThreeFourMember
1045 2035 [Member] Member avl:TwoZeroThreeFiveMember
1046 2036 [Member] Member avl:TwoZeroThreeSixMember
1047 2037 [Member] Member avl:TwoZeroThreeSevenMember
1048 2038 [Member] Member avl:TwoZeroThreeEightMember
1049 Legal Entity [Axis] Axis dei:LegalEntityAxis
1050 Entity [Domain] Member dei:EntityDomain
1051 Statement [Line Items] LineItems avl:StatementLineItems
1052 Unused tax losses for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1053 182 - Disclosure - Disclosure of detailed information about operating losses (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfDetailedInformationAboutOperatingLossesExplanatoryTableTextBlockDetails
1054 Statement [Table] Table

*

*

 avl:StatementTable
1055 Temporary difference, unused tax losses and unused tax credits [Axis] Axis ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis
1056 Temporary difference, unused tax losses and unused tax credits [Domain] Member ifrs-full:TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember
1057 Net operating losses [Member] Member avl:NetOperatingLossesMember
1058 Expiration of losses carried forward [Axis] Axis avl:ExpirationOfLossesCarriedForwardAxis
1059 Expiration of losses carried forward [Domain] Member avl:ExpirationOfLossesCarriedForwardDomain
1060 2026 [Member] Member avl:TwoZeroTwoSixMember
1061 2027 [Member] Member avl:TwoZeroTwoSevenMember
1062 2028 [Member] Member avl:TwoZeroTwoEightMember
1063 2029 [Member] Member avl:TwoZeroTwoNineMember
1064 2030 [Member] Member avl:TwoZeroThreeZeroMember
1065 2031 [Member] Member avl:TwoZeroThreeOneMember
1066 2032 [Member] Member avl:TwoZeroThreeTwoMember
1067 2033 [Member] Member avl:TwoZeroThreeThreeMember
1068 2034 [Member] Member avl:TwoZeroThreeFourMember
1069 2035 [Member] Member avl:TwoZeroThreeFiveMember
1070 2036 [Member] Member avl:TwoZeroThreeSixMember
1071 2037 [Member] Member avl:TwoZeroThreeSevenMember
1072 2038 [Member] Member avl:TwoZeroThreeEightMember
1073 Legal Entity [Axis] Axis dei:LegalEntityAxis
1074 Entity [Domain] Member dei:EntityDomain
1075 Statement [Line Items] LineItems avl:StatementLineItems
1076 Unused tax losses for which no deferred tax asset recognised Concept (Monetary) As Of ifrs-full:UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
1077 183 - Disclosure - Earnings per share (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureEarningsPerShareExplanatoryDetails
1078 Statement [Table] Table

*

*

 avl:StatementTable
1079 Legal Entity [Axis] Axis dei:LegalEntityAxis
1080 Entity [Domain] Member dei:EntityDomain
1081 Statement [Line Items] LineItems avl:StatementLineItems
1082 Weighted average number of common shares used in the calculation of basic loss per share Concept (Shares) For Period ifrs-full:WeightedAverageShares
1083 Diluted impact of convertible redeemable preferred shares Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
1084 Diluted impact of warrants Concept (Shares) For Period avl:DilutiveEffectOfWarrantsOnNumberOfOrdinaryShares
1085 Diluted impact of stock options Concept (Shares) For Period ifrs-full:DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares
1086 Weighted average number of common used in the calculation of diluted loss per share Concept (Shares) For Period ifrs-full:AdjustedWeightedAverageShares
1087 184 - Disclosure - Disclosure of maturity analysis of operating lease payments (Details) Network

*

*

 http://avalonadvancedmaterials.com/taxonomy/role/DisclosureDisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatoryDetails
1088 Statement [Table] Table

*

*

 avl:StatementTable
1089 Maturity [Axis] Axis ifrs-full:MaturityAxis
1090 Aggregated time bands[Domain] Member ifrs-full:AggregatedTimeBandsMember
1091 Year 1 [Member] Member avl:YearOneMember
1092 Year 2 [Member] Member avl:YearTwoMember
1093 Year 3 [Member] Member avl:YearThreeMember
1094 Year 4 [Member] Member avl:YearFourMember
1095 Year 5 [Member] Member avl:YearFiveMember
1096 After Year 5 [Member] Member avl:AfterYearFiveMember
1097 Legal Entity [Axis] Axis dei:LegalEntityAxis
1098 Entity [Domain] Member dei:EntityDomain
1099 Statement [Line Items] LineItems avl:StatementLineItems
1100 Operating lease obligations Concept (Monetary) As Of Credit ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease

*

*