| Number of Warrants |
Weighted-Average Exercise Price Per Share |
|||||||
| Balance at July 1, 2011 | 1,886,031 | $ | 1.73 | |||||
| Warrants granted | 9,614,875 | 0.60 | ||||||
| Warrants expired | (365,823 | ) | 4.54 | |||||
| Warrants exercised | (4,132,553 | ) | 0.72 | |||||
| Balance at June 30, 2012 | 7,002,530 | 0.63 | ||||||
| Warrants granted | 106,500 | 0.59 | ||||||
| Warrants expired | - | - | ||||||
| Warrants exercised | - | - | ||||||
| Balance at June 30, 2013 | 7,109,030 | 0.63 | ||||||