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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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Number of warrants or rights granted.

No definition available.

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Maturity term of the warrants issued by the entity.

No definition available.

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Class Of Warrant Or Right, Measurement period for share price to determine number of instruments granted

No definition available.

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Data Type:	xbrli:durationItemType
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Expected volatility used to calculate fair value of warrants.

No definition available.

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

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

No definition available.

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Namespace Prefix:	iva_
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.

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

Number of warrants or rights outstanding.

No definition available.

Name:	iva_IfrsClassOfWarrantOrRightOutstanding
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Balance Type:	na
Period Type:	instant

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

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Number of shares that each equity instruments other than share options granted in a share-based payment arrangement, entitles the holder.

No definition available.

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

Percentage of Company's share capital outstanding, issued as warrants by the entity.

No definition available.

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Namespace Prefix:	iva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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.

Name:	iva_TransactionsCostsIncurredFromWarrantsExercises
Namespace Prefix:	iva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Average life used to calculate fair value of warrant.

No definition available.

Name:	iva_WarrantAverageLife
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
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Data Type:	xbrli:decimalItemType
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Period Type:	instant

The fair value at grant date per warrant.

No definition available.

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Data Type:	dtr-types:perShareItemType
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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_
Data Type:	xbrli:integerItemType
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Period Type:	duration

Unit fair value used to calculate fair value of warrants.

No definition available.