XML 111 R87.htm IDEA: XBRL DOCUMENT
v3.21.1

Shareholders' Equity - Liquidity agreement (Details) |  | 12 Months Ended
--- | --- | ---
Jan. 19, 2018 | Dec. 31, 2020
Shareholders' Equity |  |
Liquidity Agreement Term | 12 months | 12 months

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

X
- 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