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Note 9 - Asset Retirement Obligations - Continuity of Asset Retirement Obligations (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Statement Line Items [Line Items] |  |
Beginning balance | $ 3,126 | $ 1,790
Change in estimate from discounting | (562) | 126
Accretion | 100 | 0
Change in estimate of costs | 178 | 1,210
Transferred to held for sale | 0 | 0
Ending balance | $ 2,842 | $ 3,126

X
- Definition Amount of accretion on asset retirement obligation. + References No definition available. + Details
Name: | elbm_AssetRetirementObligationAccretion
Namespace Prefix: | elbm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of decrease in the asset retirement obligation from sale. + References No definition available. + Details
Name: | elbm_AssetRetirementObligationPropertiesSold
Namespace Prefix: | elbm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated discount associated with the settlement of the obligation. + References No definition available. + Details
Name: | elbm_AssetRetirementObligationRevisionOfEstimateFromDiscounting
Namespace Prefix: | elbm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated costs associated with the settlement of the obligation. + References No definition available. + Details
Name: | elbm_AssetRetirementObligationRevisionOfEstimateOfCosts
Namespace Prefix: | elbm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | elbm_Statement1LineItems
Namespace Prefix: | elbm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of non-current provisions, including provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph l -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_l&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_NoncurrentProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant