2013 | 2012 | 2011 | ||||||||||
Outstanding at beginning of year | 17,975,074 | 21,994,982 | 21,994,982 | |||||||||
Issued related to current year's share placements | 57,586,439 | - | - | |||||||||
Exercised | - | - | - | |||||||||
Expired | (8,400,000 | ) | (4,019,908 | ) | - | |||||||
Outstanding at end of year (1) | 67,161,513 | 17,975,074 | 21,994,982 | |||||||||
| (1) | The same amount of shares of our common stock authorized was reserved for the exercise of the warrants. |