XML 87 R63.htm IDEA: XBRL DOCUMENT
v3.21.1

Company Information - Tax audit on research tax credit (Details) - EUR (€) € in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jan. 31, 2020 | Dec. 31, 2020 | Aug. 01, 2017
Disclosure of other provisions [line items] |  |  |
Mediator's waiver amount |  | € 0.3 |
Provision for CIR related to tax audit for years 2013 to 2015 |  |  |
Disclosure of other provisions [line items] |  |  |
Tax Collection Amount |  |  | € 1.9
Provision for CIR risk related to tax audit for the year ended December 31, 2018 |  |  |
Disclosure of other provisions [line items] |  |  |
French Research Tax Credit (CIR), payments received | € 4.2 |  |
Provision for CIR risk related to tax audit for the year ended December 31, 2019 |  |  |
Disclosure of other provisions [line items] |  |  |
French Research Tax Credit (CIR), payments received | € 4.3 |  |

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_DisclosureOfOtherProvisionsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the waiver amount of mediator corresponding to dispute related to subcontracting expenses. + References No definition available. + Details
Name: | iva_MediatorSWaiverAmountCorrespondingToDisputeRelatedToSubcontractingExpenses
Namespace Prefix: | iva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow from French Research Tax Credit (CIR). + References No definition available. + Details
Name: | iva_ProceedsFromFrenchResearchTaxCredit
Namespace Prefix: | iva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of tax collection notice received by the entity from tax authorities. + References No definition available. + Details
Name: | iva_TaxCollectionAmount
Namespace Prefix: | iva_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=iva_ProvisionForFrenchResearchTaxCreditRelatedToTaxAuditForYears2013To2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=iva_ProvisionForFrenchResearchTaxCreditRelatedToTaxAuditForYearsEnded2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=iva_ProvisionForFrenchResearchTaxCreditRelatedToTaxAuditForYearsEnded2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |