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v3.24.3

Notes to the interim condensed consolidated statement of financial position - Shareholders' equity - Liquidity agreement (Details) |  |  | 12 Months Ended
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Jan. 01, 2024 | Jan. 01, 2023 | Dec. 31, 2019
Notes to the interim condensed consolidated statement of financial position |  |  |
Liquidity agreement term | 12 months | 12 months | 12 months

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- Definition Number of days used to determine liquidity agreement term in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | iva_LiquidityAgreementTerm
Namespace Prefix: | iva_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | iva_NotesToInterimCondensedConsolidatedStatementOfFinancialPositionAbstract
Namespace Prefix: | iva_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration