| EUR thousand | 2018 | 2017 | |
| Rental and leasing expenses | 1,099 | 714 | |
| IT hardware and software expenses | 569 | 374 | |
| Machinery and equipment expenses | 543 | 305 | |
| Sales and marketing expenses | 1,838 | 1,189 | |
| Research and development expenses | 552 | 631 | |
| Changes in the fair value of foreign exchange forward contracts | 0 | 1 | |
| Administrative expenses | 1,877 | 987 | |
| Other expenses | 2,289 | 1,171 | |
| Total | 8,766 | 5,372 | |
| The administrative expenses for 2018 include expenses of EUR 846 thousand related to investigating strategic options. | |||
| Auditors’ fees | |||
| EUR thousand | 2018 | 2017 | |
| Auditing | 26 | 19 | |
| Other assurance services | 0 | 1 | |
| Tax services | 5 | 4 | |
| Other services | 104 | 4 | |
| Total | 135 | 28 | |
