Year Ended March 31, | ||||||||||||||||
2013 | 2012 | |||||||||||||||
Warrants | Weighted Average Exercise Price |
Warrants | Weighted Average Exercise Price |
|||||||||||||
Outstanding, beginning of year | 59,807,849 | $ | 0.14 | 38,675,169 | $ | 0.26 | ||||||||||
Granted | 16,710,445 | $ | 0.11 | 28,159,240 | $ | 0.11 | ||||||||||
Exercised | | $ | | (1,209,623 | ) | $ | 0.23 | |||||||||
Cancelled/Forfeited | (871,000 | ) | $ | 0.25 | (5,816,937 | ) | $ | 0.26 | ||||||||
Outstanding, end of year | 75,647,294 | $ | 0.11 | 59,807,849 | $ | 0.14 | ||||||||||
Exercisable, end of year | 75,647,294 | $ | 0.11 | 59,807,849 | $ | 0.14 | ||||||||||
Weighted average estimated fair value of warrants granted | $ | 0.07 | $ | 0.11 |