The amount of current trade receivables. [Refer: Trade receivables]

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

- Definition

Represents the cumulative amount of research funding received in a collaborative arrangement.

+ References

No definition available.

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Namespace Prefix:	iva_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the average payment period for trade receivables.

+ References

No definition available.

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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No definition available.

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Trade Receivables and Other Current Assets and Receivables - Trade Receivables (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Jan. 31, 2022	Dec. 31, 2020
Trade Receivables and Other Current Assets and Receivables [Line Items]
Trade receivables	€ 4,000	€ 0		€ 48
Average payment period for trade receivables	30 days
AbbVie [Member]
Trade Receivables and Other Current Assets and Receivables [Line Items]
Milestone payments received	€ 4,000		€ 4,000
3 months or less
Trade Receivables and Other Current Assets and Receivables [Line Items]
Trade receivables	€ 4,000	€ 0		€ 48