The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from the exercise of share purchase warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2022-03-24
-Paragraph 17
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_17&doctype=Standard
-URIDate 2022-03-24

+ Details

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

- Definition

Exercise price of warrants issued, represented as a percentage of volume-weighted average price of the Company's shares.

+ References

No definition available.

+ Details

Name:	iva_ClassOfWarrantOrRightExercisePriceOfWarrantsAsPercentageOfVolumeWeightedAveragePriceOfCompanySShares
Namespace Prefix:	iva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maturity term of the warrants issued by the entity.

+ References

No definition available.

+ Details

Name:	iva_ClassOfWarrantOrRightMaturityTerm
Namespace Prefix:	iva_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Subscription price per share or per unit of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	iva_ClassOfWarrantOrRightSubscriptionPrice
Namespace Prefix:	iva_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	iva_CompanyInformationLineItems
Namespace Prefix:	iva_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	iva_IfrsClassOfWarrantOrRightExercisePriceOfWarrantsOrRights
Namespace Prefix:	iva_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	iva_IfrsClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	iva_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of warrants issued

+ References

No definition available.

+ Details

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

- Definition

Percentage of Company's share capital outstanding, issued as warrants by the entity.

+ References

No definition available.

+ Details

Name:	iva_PercentageOfCompanySShareCapitalOutstandingIssuedAsWarrants
Namespace Prefix:	iva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares issued by the entity upon exercise of warrants.

+ References

No definition available.

+ Details

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

- Definition

Represents the term over which volume weighted average price per share to determine number of warrants to be issued.

+ References

No definition available.

+ Details

Name:	iva_TermOverWhichVolumeWeightedAveragePricePerShareToDetermineNumberOfWarrantsToBeIssued
Namespace Prefix:	iva_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_BorrowingsByNameAxis=iva_FinanceContractWithEuropeanInvestmentBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=iva_FinanceContractWithEuropeanInvestmentBankFirstTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=iva_FinanceContractWithEuropeanInvestmentBankSecondTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	iva_IfrsCollaborativeArrangementAndArrangementOtherThanCollaborativeAxis=iva_WarrantAgreementWithEuropeanInvestmentBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=iva_AllWarrantsAreExercisedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Company Information - Warrant agreement with the European Investment Bank (Details) - EUR (€)			12 Months Ended
	Nov. 28, 2022	Jul. 01, 2022	Dec. 31, 2022	May 16, 2022
Finance contract with EIB
Company Information
Notional amount				€ 50,000,000
Finance contract with EIB, first tranche
Company Information
Notional amount	€ 25,000,000
Finance contract with EIB, second tranche
Company Information
Notional amount			€ 25,000,000
Warrant agreement with the European Investment Bank
Company Information
Number of warrants issued	2,266,023		2,266,023
Term over which volume weighted average price per share to determine number of warrants to be issued		180 days
Subscription price per warrant		€ 0.01
Maturity term of warrants		12 years
Number of shares per warrant		1
Percentage of Company's share capital outstanding, issued as warrants	5.40%
Exercise price of warrants as a percentage of volume-weighted average price of the Company's shares	95.00%
Exercise price of warrant	€ 4.0152
Warrant agreement with the European Investment Bank \| All warrants are exercised
Company Information
Exercise price of warrant	€ 4.0152
Number of shares issued upon exercise of warrants	2,266,023
Proceeds from exercise of warrants	€ 9,098,535
Warrant agreement with the European Investment Bank \| Finance contract with EIB
Company Information
Notional amount		€ 50,000,000