XML 141 R113.htm IDEA: XBRL DOCUMENT
v3.22.1

Commitments - Additional Information (Details) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Commitments [Abstract] |  |  |
Rental payment obligation under the lease agreement | € 600 | € 600 | € 542

X
- Definition Disclosure of commitments. + References No definition available. + Details
Name: | gnft_DisclosureOfCommitmentsAbstract
Namespace Prefix: | gnft_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rental payment obligation under lease agreement. + References No definition available. + Details
Name: | gnft_RentalPaymentObligationUnderLeaseAgreement
Namespace Prefix: | gnft_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration