Exercise price of options to be issued based on an agreement.

No definition available.

Name:	elvr_ExercisePriceOfOptionsToBeIssued
Namespace Prefix:	elvr_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of options agreed to be issued in a share-based payment arrangement.

+ References

No definition available.

+ Details

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Namespace Prefix:	elvr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of options to be issued, subject to obtaining all applicable regulatory approvals in a share-based payment arrangement.

+ References

No definition available.

+ Details

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Namespace Prefix:	elvr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of pre-share consolidation options granted in a share-based payment arrangement.

+ References

No definition available.

+ Details

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Namespace Prefix:	elvr_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of tranches to be issued to options.

+ References

No definition available.

+ Details

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Namespace Prefix:	elvr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The proportion of interest held by issued share capital of the company.

+ References

No definition available.

+ Details

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Namespace Prefix:	elvr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	elvr_StockOptionAbstract
Namespace Prefix:	elvr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of share options granted in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45_b_ii&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 31
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_31_b_ii&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 31
-Subparagraph b
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_31_b_ii&doctype=Standard
-URIDate 2025-03-27

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Balance Type:
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- Details

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Namespace Prefix:
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- Details

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Share Capital, Grant of Options (Details)		12 Months Ended
Share Capital, Grant of Options (Details)	Sep. 04, 2025 shares	Jun. 30, 2026 shares	Jun. 30, 2025 shares	Jun. 30, 2024 shares	Aug. 12, 2025 Tranche $ / shares shares
Stock options [Abstract]
Number of pre-share consolidation options granted in share-based payment arrangement		408,541,913	0	10,000,000
Resource Capital Fund VIII L.P. [Member]
Stock options [Abstract]
Number of options agreed to be issued in tranches (in shares)					8,000,000
Issue price (in dollars per share) \| $ / shares					$ 4.8
Number of tranches to be issued \| Tranche					2
Resource Capital Fund VIII L.P. [Member] \| Sayona Mining Limited [Member]
Stock options [Abstract]
Number of options agreed to be issued in tranches (in shares)					1,200,000,000
Issue price (in dollars per share) \| $ / shares					$ 0.032
Resource Capital Fund VIII L.P. [Member] \| Tranche 1 [Member]
Stock options [Abstract]
Percentage of interest in issued share capital					9.99%
Number of pre-share consolidation options granted in share-based payment arrangement	2,723,613
Resource Capital Fund VIII L.P. [Member] \| Tranche 1 [Member] \| Sayona Mining Limited [Member]
Stock options [Abstract]
Number of pre-share consolidation options granted in share-based payment arrangement	408,541,913
Resource Capital Fund VIII L.P. [Member] \| Tranche 2 [Member]
Stock options [Abstract]
Number of options to be issued, subject to obtaining all applicable regulatory approvals (in shares)					1,200,000,000
Number of share options granted in share-based payment arrangement		5,276,387