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Notes to the interim condensed consolidated statement of financial position - Financial debt - French state-guaranteed loan ("PGE") and equity recovery loans ("PPR") (Details) € in Thousands, $ in Millions |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 18, 2024 EUR (€) | May 31, 2023 | Jun. 30, 2022 EUR (€) loan | May 31, 2020 EUR (€) agreement | Jun. 30, 2024 EUR (€) | Jun. 30, 2023 EUR (€) | Dec. 31, 2022 | Jan. 18, 2024 USD ($)
Guarantee Details |  |  |  |  |  |  |  |
Loan obtained |  |  |  |  | € 24,911 |  |  |
Total amount of loan | $ |  |  |  |  |  |  |  | $ 25
Repayments of borrowings |  |  |  |  | 1,177 | € 1,448 |  |
Loan agreements with syndicate of French banks, under stimulus economic plan |  |  |  |  |  |  |  |
Guarantee Details |  |  |  |  |  |  |  |
Number of loan agreements | loan |  |  | 2 |  |  |  |  |
Total amount of loan |  |  | € 5,300 |  |  |  |  |
Loan agreements with syndicate of French banks, state guaranteed loan (Pret Garanti par l'Etat) |  |  |  |  |  |  |  |
Guarantee Details |  |  |  |  |  |  |  |
Number of loan agreements | loan |  |  | 1 |  |  |  |  |
Percentage of loan guaranteed by French state |  |  |  |  |  |  | 90.00% |
Equity recovery loans |  |  |  |  |  |  |  |
Guarantee Details |  |  |  |  |  |  |  |
Financing period of loan |  | 8 years |  |  |  |  |  |
Repayment period for loan |  | 4 years |  |  |  |  |  |
Financing from a syndicate of French banks |  |  |  |  |  |  |  |
Guarantee Details |  |  |  |  |  |  |  |
Number of loans obtained guaranteed by the french state | agreement |  |  |  | 3 |  |  |  |
Loan obtained |  |  |  | € 10,000 |  |  |  |
Extension of term of debt |  |  |  | 4 years |  |  |  |
Number of loan agreements | loan |  |  | 3 |  |  |  |  |
Repayments of borrowings |  |  |  |  | € 1,200 |  |  |
Licensing and collaboration agreement with CTTQ [Member] |  |  |  |  |  |  |  |
Guarantee Details |  |  |  |  |  |  |  |
Amount invoiced to counterparty for milestone payment | € 25,000 |  |  |  |  |  |  |

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