2017 | 2016 | 2015 | ||||||||
Stock Options | Weighted Average Exercise Price $ | Stock Options | Weighted Average Exercise Price $ | Stock Options | Weighted Average Exercise Price $ | |||||
Outstanding, beginning of the year | 8,674,227 | 1.83 | 8,561,394 | 2.17 | 5,446,394 | 3.19 | ||||
Granted during the year | 405,000 | 0.48 | 1,572,000 | 0.28 | 3,280,000 | 0.43 | ||||
Forfeited during the year | (2,012,660 | ) | 3.45 | (737,500 | ) | 0.65 | (100,000 | ) | 1.69 | |
Expired during the year | (116,900 | ) | 2.22 | (721,667 | ) | 3.61 | (65,000 | ) | 1.49 | |
Exercised during the year | (801,000 | ) | 0.43 | — | — | — | — | |||
Outstanding, end of the year | 6,148,667 | 1.39 | 8,674,227 | 1.83 | 8,561,394 | 2.17 | ||||
Options exercisable, end of the year | 5,453,501 | 1.51 | 6,729,643 | 2.27 | 6,476,394 | 2.73 |