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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