Research and Development incentives receivables - Current and non-current (Details) - EUR (€) € in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|---|
| Disclosure of financial assets [line items] | |||
| Non-current R&D incentives receivables-discounted value | € 93,407 | € 73,443 | € 64,001 |
| Current R&D incentives receivables | 21,949 | 11,203 | 11,782 |
| Total R&D incentives receivables | 115,356 | € 84,646 | € 75,783 |
| France | |||
| Disclosure of financial assets [line items] | |||
| Non-current R&D incentives receivables-discounted value | 31,804 | ||
| Belgium | |||
| Disclosure of financial assets [line items] | |||
| Non-current R&D incentives receivables-discounted value | € 61,603 |