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Related party transactions - Disclosure of key management personnel compensation (Details) - EUR (€) € in Thousands | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Related party transactions [abstract] |  |
Personnel and other short-term employee benefits | € 1,713 | € 1,386
Extra pension benefits | 21 | 11
Share-based compensation | 519 | 408
Advisory fees | 0 | 318
Executive Board Members and other Executive Members compensation | € 2,253 | € 2,123

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- References No definition available. + Details
Name: | ifrs-full_KeyManagementPersonnelCompensation
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_KeyManagementPersonnelCompensationPostemploymentBenefits
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Key Management Personnel Compensation, Advisory Fees + References No definition available. + Details
Name: | inpha_KeyManagementPersonnelCompensationAdvisoryFees
Namespace Prefix: | inpha_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration