3. Other operating income
| EUR 1,000 | 2020 | 2019 |
| Rental income | 26 | |
| Gain on disposal of non-current assets* | 17 | 1,415 |
| Other income items' | 931 | 206 |
| Other operating income total | 948 | 1,647 |
| *Tecnotree received a tax refund of 465 thousand euros related to operation of the subsidiary in Ireland in years 2014 - 2016 | ||