XML 124 R85.htm IDEA: XBRL DOCUMENT v3.21.1

Other income - Additional Information (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Text Block [Abstract]
Revenue from grants	€ 200	€ 30	€ 2,900
Contingencies related to grant	€ 0

X

- Definition

The amount of income recognised in relation to government grants. [Refer: Government grants]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 20
-IssueDate 2020-01-01
-Paragraph 39
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=20&code=ifrs-tx-2020-en-r&anchor=para_39_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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

X

- Definition

Contingencies related to grant.

+ References

No definition available.

+ Details

Name:	imtx_ContingenciesRelatedToGrant
Namespace Prefix:	imtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Text block.

+ References

No definition available.

+ Details

Name:	imtx_TextBlockAbstract
Namespace Prefix:	imtx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration