| 2010 share option programme | 31.12.2017 | 31.12.2016 | ||||||
| Outstanding at the beginning of the period | 439,500 | 534,400 | ||||||
| Granted during the period | - | - | ||||||
| Forfeited during the period | 4,500 | 13,500 | ||||||
| Exercised during the period | - | - | ||||||
| Expired during the period | 70,650 | 81,400 | ||||||
| Outstanding at the end of the period | 364,350 | 439,500 | ||||||
| Exercisable at the end of the period | - | - | ||||||
| Range of exercise prices for outstanding options | EUR 3.26 – 4.05 | EUR 2.44 – 4.05 | ||||||
| Weighted average of remaining contractual life | 18 months | 27 months | ||||||
| 2015 share option programme | 31.12.2017 | 31.12.2016 | ||||||
| Outstanding at the beginning of the period | 548,000 | - | ||||||
| Granted during the period | 629,500 | 555,500 | ||||||
| Forfeited during the period | 34,000 | 7,500 | ||||||
| Exercised during the period | - | - | ||||||
| Expired during the period | - | - | ||||||
| Outstanding at the end of the period | 1,143,500 | 548,000 | ||||||
| Exercisable at the end of the period | - | - | ||||||
| Range of exercise prices for outstanding options | EUR 2.49 – 4.02 | EUR 2.49 – 3.28 | ||||||
| Weighted average of remaining contractual life | 60 months | 59 months | ||||||