XML 125 R101.htm IDEA: XBRL DOCUMENT
v3.21.1

Provisions for Retirement Benefit Obligations - Breakdown of expense recognized for the period (Details) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Provisions for Retirement Benefit Obligations |  |  |
Expense for the period | € 209 | € 1 | € 194
Service cost for the period | (202) | (195) | (192)
Interest cost for the period | (8) | (16) | (11)
Plan curtailments and modifications |  | 157 |
Benefits for the period |  | 53 | 9
Total | € (209) | € (1) | € (194)

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfDefinedBenefitPlansAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of post-employment benefit expense relating to defined benefit plans. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 5 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_5&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of benefits for the period attributable to defined benefit plan. + References No definition available. + Details
Name: | iva_DefinedBenefitPlanBenefitsForPeriod
Namespace Prefix: | iva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) recognized for plan curtailments and modifications related to defined benefit plan. + References No definition available. + Details
Name: | iva_DefinedBenefitPlanGainLossFromPlanCurtailmentsAndModifications
Namespace Prefix: | iva_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cost recognized for passage of time related to defined benefit plan. + References No definition available. + Details
Name: | iva_IfrsDefinedBenefitPlanInterestCost
Namespace Prefix: | iva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. + References No definition available. + Details
Name: | iva_IfrsDefinedBenefitPlanServiceCost
Namespace Prefix: | iva_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration