| December 31, 2017 | December 31, 2016 | |||||||||||
| Number of | Weighted Average | Number of | Weighted Average | |||||||||
| Options | Exercise Price (CAD$) | Options | Exercise Price (CAD$) | |||||||||
| Outstanding, beginning of year | 15,710,000 | 0.16 | 15,765,000 | 0.38 | ||||||||
| Granted | 2,900,000 | 0.10 | 3,025,000 | 0.065 | ||||||||
| Expired | (2,500,000 | ) | (0.45 | ) | (2,870,000 | ) | (1.24 | ) | ||||
| Forfeiture | (60,000 | ) | (0.10 | ) | (210,000 | ) | (0.32 | ) | ||||
| Outstanding, end of year | 16,050,000 | 0.16 | 15,710,000 | 0.16 | ||||||||
| Exercisable, end of year | 15,850,000 | 0.17 | 15,310,000 | 0.17 | ||||||||