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: |