XML 117 R78.htm IDEA: XBRL DOCUMENT v3.21.1

Leases - Summary of expenses related to right-of-use assets and lease liabilities (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Line Items]
Depreciation, right-of-use assets	€ 2,195	€ 1,950
Interest expense form lease	260	170
Expense relating to short-term leases for which recognition exemption has been used	51	27
Buildings [member]
Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Line Items]
Depreciation, right-of-use assets	2,036	1,804
IT and telecommunication
Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Line Items]
Depreciation, right-of-use assets	101	101
Vehicles [member]
Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Line Items]
Depreciation, right-of-use assets	50	37
Other assets [member]
Disclosure Of Expenses Related ToRightOfUseAssets And Lease Liabilities [Line Items]
Depreciation, right-of-use assets	€ 8	€ 8

X

- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_a&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_DepreciationRightofuseAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of the expense relating to short-term leases accounted for applying paragraph 6 of IFRS 16. This expense need not include the expense relating to leases with a lease term of one month or less. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_c&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Disclosure of expenses related to right-of-use assets and lease liabilities.

+ References

No definition available.

+ Details

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

X

- Definition

Interest expense on lease.

+ References

No definition available.

+ Details

Name:	imtx_InterestExpenseOnLease
Namespace Prefix:	imtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=ifrs-full_BuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=ifrs-full_CommunicationAndNetworkEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=ifrs-full_VehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=ifrs-full_OtherAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: