Trade payables and others (Details) € in Thousands |
Dec. 31, 2025
EUR (€)
|
Dec. 31, 2025
loan
|
Dec. 31, 2025
loan_agreement
|
Dec. 31, 2024
EUR (€)
loan
|
Dec. 31, 2023
EUR (€)
loan
|
Aug. 31, 2022
loan
|
|---|---|---|---|---|---|---|
| Disclosure Of Detailed Information About Trade Payables And Others [Line Items] | ||||||
| Suppliers (excluding payables related to capital expenditures) | € 7,475 | € 7,923 | € 8,561 | |||
| Tax and employee-related payables | 6,546 | 6,962 | 7,021 | |||
| Other payables | 1,021 | 1,122 | 1,436 | |||
| Trade payables and others excluding payables related to capital expenditures | 15,042 | 16,007 | 17,018 | |||
| Payables related to capital expenditures | 0 | 0 | 0 | |||
| Payables and others | € 15,042 | € 16,007 | € 17,018 | |||
| PGE loan agreement, Societe Generale and BNP Paribas | ||||||
| Disclosure Of Detailed Information About Trade Payables And Others [Line Items] | ||||||
| Borrowing, number of loan agreement | 2 | 2 | 2 | 2 | 2 |