XML 146 R122.htm IDEA: XBRL DOCUMENT v3.21.1

Related-Party Transactions (Details) - ISLS Consulting - EUR (€) € in Thousands		12 Months Ended
	Dec. 14, 2018	Dec. 31, 2019	Dec. 31, 2018
Disclosure of transactions between related parties [line items]
Consulting fees		€ 169	€ 162
Number of share warrants granted	80,000

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of services received in related party transactions. [Refer: Related parties [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 24
-IssueDate 2020-01-01
-Paragraph 21
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_21_c&doctype=Standard
-URIDate 2020-01-01

+ Details

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

X

- Definition

Number of share warrants granted to related party by the entity.

+ References

No definition available.

+ Details

Name:	iva_NumberOfShareWarrantsGrantedToRelatedParty
Namespace Prefix:	iva_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=iva_IslsConsultingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: