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The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2023-03-23

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

The weighted average exercise price of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. [Refer: Weighted average [member]]

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Balance Type:	na
Period Type:	instant

Number of warrants or rights granted.

No definition available.

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

Maturity term of the warrants issued by the entity.

No definition available.

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

Expected volatility used to calculate fair value of warrants.

No definition available.

Name:	iva_ExpectedVolatility
Namespace Prefix:	iva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Fair value of warrants outstanding

No definition available.

Name:	iva_FairValueOfWarrantsOutstanding
Namespace Prefix:	iva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

No definition available.

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

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.

No definition available.

Name:	iva_IfrsClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Number of warrants or rights outstanding.

No definition available.

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

Maximum potential amount of gross proceeds that the company will receive from exercise of warrants.

No definition available.

Name:	iva_MaximumPotentialGrossProceedsFromExerciseOfWarrants
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

No definition available.

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

Subscription premium price per share of other equity instruments granted in share-based payment arrangement.

No definition available.

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

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

No definition available.

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

Transaction costs on issue of warrants

No definition available.

Name:	iva_TransactionCostsOnIssueOfWarrants
Namespace Prefix:	iva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Average life used to calculate fair value of warrant.

No definition available.

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

Cap of the put option used to calculate fair value of warrants.

No definition available.

Name:	iva_WarrantsCapOfPutOption
Namespace Prefix:	iva_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

Stock price used to calculate fair value of warrants.

No definition available.

Name:	iva_WarrantsStockPrice
Namespace Prefix:	iva_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

The subscription price per warrant.

No definition available.

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

Threshold number of specified trading days that common stock price to conversion price of warrants must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

No definition available.

Name:	iva_WarrantsThresholdTradingDays
Namespace Prefix:	iva_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The fair value per warranty unit outstanding

No definition available.

Name:	iva_WarrantsUnitFairValue
Namespace Prefix:	iva_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

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Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=iva_IssuanceOfWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=iva_Bsa2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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

Name:	ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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