Percentage of ADs issued for exercisable shares of warrants.

No definition available.

Name:	evax_ClassOfWarrantsExercisablePercentageOfAds
Namespace Prefix:	evax_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The decrease in the amount of shares authorized.

+ References

No definition available.

+ Details

Name:	evax_DecreaseInSharesAuthorized
Namespace Prefix:	evax_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the commitment fee for a purchase agreement.

+ References

No definition available.

+ Details

Name:	evax_PurchaseAgreementCommitmentFee
Namespace Prefix:	evax_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the maximum aggregate amount of stock available to be issued as part of a purchase agreement.

+ References

No definition available.

+ Details

Name:	evax_PurchaseAgreementMaximumAggregateAmount
Namespace Prefix:	evax_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the maximum required single purchase amount as part of a purchase agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	evax_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the price per share for shares issued during the period.

+ References

No definition available.

+ Details

Name:	evax_SharesIssuedPricePerShare1
Namespace Prefix:	evax_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	evax_Statement1LineItems
Namespace Prefix:	evax_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

the number of ADs per unit of units issued.

+ References

No definition available.

+ Details

Name:	evax_UnitsIssuedNumberOfAdsPerUnit
Namespace Prefix:	evax_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of warrants per unit of units issued.

+ References

No definition available.

+ Details

Name:	evax_UnitsIssuedNumberOfWarrantsPerUnit
Namespace Prefix:	evax_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Per unit price of units issued.

+ References

No definition available.

+ Details

Name:	evax_UnitsIssuedOfferingPrice
Namespace Prefix:	evax_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares of units issued.

+ References

No definition available.

+ Details

Name:	evax_UnitsIssuedShares
Namespace Prefix:	evax_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of residual interest in the assets of the entity after deducting all its liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Name:	ifrs-full_Equity
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The increase (decrease) in the number of shares outstanding. [Refer: Number of shares outstanding]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The increase in equity through the issue of equity instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The nominal value per share.

+ References

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+ Details

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Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from issuing shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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-URIDate 2024-03-27

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=evax_GlobalGrowthHoldingLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=evax_AmericanDepositoryShareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=evax_JonesTradingInstitutionalServicesLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_MajorOrdinaryShareTransactionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

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Note 2 - Liquidity and Going Concern Assessment (Details Textual) - USD ($)				1 Months Ended	6 Months Ended
	Jan. 31, 2025	Jan. 24, 2025	Jan. 17, 2025	Jan. 31, 2025	Jun. 30, 2025	Jun. 30, 2024	Mar. 26, 2025	Jan. 16, 2025	Dec. 31, 2024	Dec. 31, 2023	Jul. 31, 2023	Jun. 02, 2022
Statement Line Items [Line Items]
Proceeds from issuing shares	$ 10.8			$ 10.8	$ 17,828,000	$ 14,182,000
Increase (decrease) in number of shares outstanding (in shares)	199,868,050		19,660,139
Par value per share (in dollars per share)	$ 0.25		$ 0.25	$ 0.25	$ 0.25			$ 1
Decrease in shares authorized (in shares)			58,980,417
Equity			$ 78,640,556		$ 6,226,000	1,253,000			$ (1,652,000)	$ (4,729,000)
Units issued, shares (in shares)	3,997,361			3,997,361
Class of warrants, exercisable, percentage of ADs	50.00%			50.00%
Units issued, offering price (in dollars per share)	$ 2.71			$ 2.71
Units issued, number of warrants per unit (in shares)	1			1
Units issued, number of ADs per unit (in shares)	2			2
Issue of equity	$ 49,967,012.5				17,828,000	14,182,000
Issued capital [member]
Statement Line Items [Line Items]
Equity	$ 78,332,151.5			$ 78,332,151.5	11,823,000	8,244,000			$ 10,516,000	$ 5,899,000
Issue of equity					$ 1,307,000	$ 2,345,000
Global Growth Holding Limited [member]
Statement Line Items [Line Items]
Purchase agreement, maximum aggregate amount											$ 20,000,000
Purchase agreement, maximum required single purchase amount											700,000
Purchase agreement, commitment fee											$ 1,100,000
American depository share [member]
Statement Line Items [Line Items]
Proceeds from issuing shares		$ 4,800,000
Increase (decrease) in number of shares outstanding (in shares)		696,400
Shares issued, price per share (in dollars per share)		$ 7.1776
American depository share [member] \| JonesTrading Institutional Services LLC [member]
Statement Line Items [Line Items]
Proceeds from issuing shares		$ 14,413,306
Purchase agreement, maximum aggregate amount							$ 4,480,000					$ 100,000,000
Increase (decrease) in number of shares outstanding (in shares)		837,027
Major ordinary share transactions [member] \| Public offering shares [member]
Statement Line Items [Line Items]
Proceeds from issuing shares				10,800,000
Major ordinary share transactions [member] \| At the market shares [member]
Statement Line Items [Line Items]
Proceeds from issuing shares				$ 5,000,000