Trade receivables and other current assets - Disclosure of Break Down of Trade Receivables (Details) - EUR (€) € in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of Trade Receivables and Other Current Assets [Line Items] | ||
| Trade receivables | € 2,136 | € 2,977 |
| Due in 3 months or less | ||
| Disclosure of Trade Receivables and Other Current Assets [Line Items] | ||
| Trade receivables | 2,136 | 2,977 |
| Due between 3 and 6 months | ||
| Disclosure of Trade Receivables and Other Current Assets [Line Items] | ||
| Trade receivables | 0 | 0 |
| Due between 6 and 12 months | ||
| Disclosure of Trade Receivables and Other Current Assets [Line Items] | ||
| Trade receivables | 0 | 0 |
| Due after more than 12 months | ||
| Disclosure of Trade Receivables and Other Current Assets [Line Items] | ||
| Trade receivables | € 0 | € 0 |