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Capital Structure and Financial Matters - Loss of subscribed share capital (Details)	Dec. 31, 2018
Capital Structure and Financial Matters
Minimum percentage of lost subscribed share capital	50.00%

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- Definition

Minimum percentage of lost subscribed share capital

+ References

No definition available.

+ Details

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Namespace Prefix:	evax_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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