The following table shows the items of employee benefits:
| in € thousand | 2015 | 2016 | 2017 | |||
| Wages and salaries | 1,124 | 1,467 | 2,897 | |||
| Share-based payment expenses | 242 | 868 | 4,550 | |||
| Social security expenses* | 96 | 126 | 182 | |||
| Employee benefits | 1,462 | 2,462 | 7,629 |
* Employer's share of social security contributions