| Weighted | |||||||
| Average Exercise | |||||||
| Number | Price | ||||||
| Outstanding, December 31, 2015 | 2,418,571 | $ | 2.68 | ||||
| Granted | 1,325,000 | $ | 1.30 | ||||
| Exercised | (340,000 | ) | $ | 0.43 | |||
| Expired | (880,000 | ) | $ | 4.52 | |||
| Outstanding, December 31, 2016 | 2,523,571 | $ | 1.61 | ||||
| Granted | 875,000 | $ | 0.33 | ||||
| Exercised | - | - | |||||
| Expired | (1,070,000 | ) | $ | 1.70 | |||
| Outstanding, December 31, 2017 | 2,328,571 | $ | 1.11 |