The amount of financial assets that the entity has pledged as collateral for liabilities or contingent liabilities, including amounts that have been reclassified in accordance with paragraph 3.2.23(a) of IFRS 9. [Refer: Contingent liabilities [member]; Financial assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 14
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_14_a&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the settlement of duties in respective with VAT credit receivables.

+ References

No definition available.

+ Details

Name:	iva_AmountOfOffsettingVatCreditReceivables
Namespace Prefix:	iva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of release of term account pledge.

+ References

No definition available.

+ Details

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

- Definition

Represents the net amount paid in cash to French tax authorities.

+ References

No definition available.

+ Details

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

- Definition

The amount of claim (including surcharge and interest) rejected by tax authorities.

+ References

No definition available.

+ Details

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

- Definition

Amount of indemnification received under guarantee.

+ References

No definition available.

+ Details

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

- Definition

Number of key recruitments announced for development of lanifibranor

+ References

No definition available.

+ Details

Name:	iva_NumberOfKeyRecruitmentsAnnouncedForDevelopmentOfLanifibranor
Namespace Prefix:	iva_
Data Type:	xbrli:integerItemType
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 domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

- Definition

The amount of proposed tax adjustment (including penalties and late payment interest) received from French tax authorities.

+ References

No definition available.

+ Details

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

- Definition

Represents the total amount paid to French tax authorities.

+ References

No definition available.

+ Details

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

- Details

Name:	ifrs-full_ClassesOfProvisionsAxis=iva_ProvisionForTaxAuditForYearsEnded20132014And2015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	ifrs-full_ClassesOfProvisionsAxis=iva_ProvisionForTaxAuditForYearsEnded2016And2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=iva_CreditAgricoleBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Company Information - Tax audit on payroll tax (Details) € in Millions						12 Months Ended
	Nov. 26, 2021 EUR (€)	Sep. 16, 2021 employee	Jun. 09, 2021 EUR (€)	Mar. 09, 2021 EUR (€)	Feb. 11, 2021 EUR (€)	Dec. 31, 2021 EUR (€)	Dec. 31, 2022 EUR (€)	Jan. 06, 2021 EUR (€)
Company Information
Number of key recruitments announced for development of lanifibranor \| employee		7
Cash pledged as security						€ 1.7
Indemnification amount received						€ 2.0
Amount of offsetting against VAT credit receivables			€ 1.3
Provision related to tax audit for the years ended 2013, 2014 and 2015 \| Guarantee given to the tax authorities
Company Information
Cash pledged as security							€ 1.6
Provision related to tax audit for the years ended 2013, 2014 and 2015 \| Tax audit for payroll taxes
Company Information
Proposed payroll tax adjustment					€ 1.9
Indemnification amount received				€ 2.0
Total amount paid to French tax authorities			1.8
Net amount paid by bank transfer			€ 0.5
Provision related to tax audit for the years ended december 2016 and 2017 \| Guarantee given to the tax authorities
Company Information
Cash pledged as security								€ 1.0
Provision related to tax audit for the years ended december 2016 and 2017 \| Tax audit for payroll taxes
Company Information
Claim for total amount	€ 1.2
Crdit Agricole bank \| Provision related to tax audit for the years ended 2013, 2014 and 2015 \| Guarantee given to the tax authorities
Company Information
Amount of Release of Term Account Pledge							€ 1.0