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

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 2024-01-01
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2024-03-27

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

The nominal value per share.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 79
-Subparagraph a
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a_iii&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_ParValuePerShare
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	instant

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]]

Name:	ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:perShareItemType
Balance Type:	na
Period Type:	instant

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

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

No definition available.

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

Per share price adjustment for calculation of subscription price of warrants.

No definition available.

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

Expected volatility used to calculate fair value of stock and 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
Namespace Prefix:	iva_
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

The increase (decrease) in a financial instrument as a result of an increase (decrease) in a designated risk component that was reasonably possible at the end of the reporting period. Excludes defined benefit plan obligations.

No definition available.

Name:	iva_IncreaseDecreaseInFinancialInstrumentDueToReasonablyPossibleIncreaseDecreaseInDesignatedRiskComponent
Namespace Prefix:	iva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

No definition available.

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

Number of warrants issued

No definition available.

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

The reasonably possible percentage of the increase (decrease) in the designated risk component used to determine the value of the financial instrument. Excludes defined benefit plan obligations.

No definition available.

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

Percentage of share capital held by counterparty if all outstanding warrants are exercised

No definition available.

Name:	iva_PercentageOfShareCapitalHeldByCounterpartyIfAllOutstandingWarrantsAreExercised
Namespace Prefix:	iva_
Data Type:	dtr-types:percentItemType
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.

Name:	iva_TermOverWhichVolumeWeightedAveragePricePerShareToDetermineNumberOfWarrantsToBeIssued
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 unit of warrants outstanding.

No definition available.

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

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

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

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

Name:	iva_IfrsClassOfWarrantOrRightAxis=iva_T2BsaPrefundedWarrantsMember
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: