| Property, plant and equipment 2018 | ||||
| EUR thousand | Machinery and equipment | Fixed assets in progress | Other tangible assets | Total |
| Acquisition cost, Jan 1, 2018 | 1,242 | 164 | 159 | 1,565 |
| Additions | 756 | 104 | 41 | 901 |
| Acquisition cost, Dec 31, 2018 | 1,998 | 268 | 200 | 2,466 |
| Accumulated depreciation and impairment, Jan 1, 2018 | 685 | 0 | 58 | 743 |
| Depreciation | 272 | 0 | 45 | 317 |
| Accumulated depreciation and impairment, Dec 31, 2018 | 957 | 0 | 103 | 1,060 |
| Carrying amount, Jan 1, 2018 | 557 | 164 | 100 | 821 |
| Carrying amount, Dec 31, 2018 | 1,041 | 268 | 96 | 1,406 |
| The sum of EUR 268 thousand recognized under fixed assets in progress at the end of the 2018 financial period mainly consists of advance payments for production equipment for the new NFC lock. | ||||
| Property, plant and equipment 2017 | ||||
| EUR thousand | Machinery and equipment | Fixed assets in progress | Other tangible assets | Total |
| Acquisition cost, Jan 1, 2017 | 982 | 0 | 76 | 1,058 |
| Additions | 260 | 164 | 83 | 507 |
| Acquisition cost, Dec 31, 2017 | 1,242 | 164 | 159 | 1,565 |
| Accumulated depreciation and impairment, Jan 1, 2017 | 499 | 0 | 37 | 536 |
| Depreciation | 182 | 0 | 21 | 203 |
| Impairment | 4 | 0 | 0 | 4 |
| Accumulated depreciation and impairment, Dec 31, 2017 | 685 | 0 | 58 | 743 |
| Carrying amount, Jan 1, 2017 | 483 | 0 | 39 | 522 |
| Carrying amount, Dec 31, 2017 | 557 | 164 | 100 | 821 |
