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Personnel expenses (Tables) | 12 Months Ended
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Dec. 31, 2020
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Summary of Personnel Expenses | The Group recognized the following personnel expenses:
|  | Year ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (Euros in thousands) |
Wages and salaries |  |  |  |  |  |  |  |  |  |  |  |
Research and development expenses |  |  | 15,277 |  |  |  | 11,635 |  |  |  | 10,485 |
General and administrative expenses |  |  | 6,968 |  |  |  | 3,596 |  |  |  | 2,233 |
Total Wages and salaries |  |  | 22,245 |  |  |  | 15,231 |  |  |  | 12,718 |
Other employee benefits |  |  |  |  |  |  |  |  |  |  |  |
Research and development expenses |  |  | 2,624 |  |  |  | 2,035 |  |  |  | 1,920 |
General and administrative expenses |  |  | 1,015 |  |  |  | 728 |  |  |  | 607 |
Total other employee benefits |  |  | 3,639 |  |  |  | 2,763 |  |  |  | 2,527 |
Share-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |
Research and development expenses |  |  | 14,546 |  |  |  | 1,556 |  |  |  | 238 |
General and administrative expenses |  |  | 10,973 |  |  |  | 460 |  |  |  | 100 |
Total share-based compensation expense |  |  | 25,519 |  |  |  | 2,016 |  |  |  | 338 |
Total |  |  | 51,403 |  |  |  | 20,010 |  |  |  | 15,583 |

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