| Weighted | ||||||
| Number of | average | |||||
| options | exercise price | |||||
| $ | ||||||
| Balance at January 1, 2016 | 140,738 | 1.20 | ||||
| Options granted | 3,400,000 | 0.16 | ||||
| Options cancelled | (52,818 | ) | 1.26 | |||
| Options forfeited | (87,920 | ) | 1.16 | |||
| Balance at December 31, 2016 and December 31, 2017 | 3,400,000 | 0.16 |