Name:	ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems
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The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard
-URIDate 2022-03-24

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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

The weighted average exercise price of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. [Refer: Weighted average [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_45&doctype=Standard
-URIDate 2022-03-24

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Period Type:	instant

Exercise price of warrants issued, represented as a percentage of volume-weighted average price of the Company's shares.

No definition available.

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Number of warrants or rights granted.

No definition available.

Name:	iva_ClassOfWarrantOrRightGranted
Namespace Prefix:	iva_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Expected volatility used to calculate fair value of warrants.

No definition available.

Name:	iva_ExpectedVolatility
Namespace Prefix:	iva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Exercise price per share or per unit of warrants or rights outstanding.

No definition available.

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Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

No definition available.

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Period Type:	instant

Number of warrants or rights outstanding.

No definition available.

Name:	iva_IfrsClassOfWarrantOrRightOutstanding
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Maximum potential amount of gross proceeds that the company will receive from exercise of warrants.

No definition available.

Name:	iva_MaximumPotentialGrossProceedsFromExerciseOfWarrants
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Data Type:	xbrli:monetaryItemType
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Percentage of Company's share capital outstanding, issued as warrants by the entity.

No definition available.

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Data Type:	dtr-types:percentItemType
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Period Type:	duration

Subscription premium price per share of other equity instruments granted in share-based payment arrangement.

No definition available.

Name:	iva_SubscriptionPremiumPricePerShareOfOtherEquityInstrumentsGranted
Namespace Prefix:	iva_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

The amount of transactions costs incurred from warrants exercises.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Average life used to calculate fair value of warrant.

No definition available.

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Namespace Prefix:	iva_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Cap of the put option used to calculate fair value of warrants.

No definition available.

Name:	iva_WarrantsCapOfPutOption
Namespace Prefix:	iva_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

The fair value at grant date per warrant.

No definition available.

Name:	iva_WarrantsFairValueAtGrantDate
Namespace Prefix:	iva_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Stock price used to calculate fair value of warrants.

No definition available.

Name:	iva_WarrantsStockPrice
Namespace Prefix:	iva_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

Threshold number of specified trading days that common stock price to conversion price of warrants must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

No definition available.

Name:	iva_WarrantsThresholdTradingDays
Namespace Prefix:	iva_
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Unit fair value used to calculate fair value of warrants.

No definition available.