XML 132 R104.htm IDEA: XBRL DOCUMENT
v3.22.1

Financial Income and Expenses - Additional Information (Details) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Financial Income And Expenses [Line Items] |  |  |
Financial income occured by renegotiating the convertible bond debt OCEANE | € 35,578 | € 0 | € 0
Foreign exchange gain (loss) | 6,713 |  |
OCEANE |  |  |
Disclosure Of Financial Income And Expenses [Line Items] |  |  |
Financial income occured by renegotiating the convertible bond debt OCEANE | € 35,600 |  |
Proportion of payment of coupons rate (as a percent) | 3.50% |  |
Proportion of discount of bond debt at effective interest rate (as a percent) | 8.80% |  |

X
- Definition Disclosure of financial income and expenses. + References No definition available. + Details
Name: | gnft_DisclosureOfFinancialIncomeAndExpensesLineItems
Namespace Prefix: | gnft_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Finance income from renegotiation of debt + References No definition available. + Details
Name: | gnft_FinanceIncomeFromRenegotiationOfDebt
Namespace Prefix: | gnft_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of discount of bond debt at effective interest rate. + References No definition available. + Details
Name: | gnft_PercentageOfDiscountOfBondDebtAtEffectiveInterestRate
Namespace Prefix: | gnft_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of payment of coupons rate. + References No definition available. + Details
Name: | gnft_PercentageOfPaymentOfCouponsRate
Namespace Prefix: | gnft_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2021-01-01 -Paragraph 52 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=21&code=ifrs-tx-2021-en-r&anchor=para_52_a&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 35 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_35&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=gnft_BondsConvertibleOrExchangeableIntoNewOrExistingSharesOCEANEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |