| |
|
|
|
|
|
|
|
Weighted Average
|
|
| |
|
Number of
|
|
|
Weighted Average
|
|
|
Remaining Contractual
|
|
| |
|
Warrants
|
|
|
Exercise Price
|
|
|
Term (Years)
|
|
| Balance, July 31, 2010 |
|
5,231,886
|
|
$ |
2.90
|
|
|
1.41
|
|
| Issued |
|
4,055,659
|
|
|
3.95
|
|
|
1.00
|
|
| Exercised |
|
(3,163,756
|
) |
|
2.51
|
|
|
0.18
|
|
| Expired |
|
(1,774,806
|
) |
|
3.10
|
|
|
-
|
|
| Balance, July 31, 2011 |
|
4,348,983
|
|
|
3.57
|
|
|
0.79
|
|
| Issued |
|
1,276,280
|
|
|
9.36
|
|
|
0.75
|
|
| Exercised |
|
(112,451
|
) |
|
3.16
|
|
|
1.32
|
|
| Expired |
|
(3,954,000
|
) |
|
4.90
|
|
|
-
|
|
| Balance, July 31, 2012 |
|
1,558,812
|
|
|
4.95
|
|
|
1.45
|
|
| Issued |
|
2,600,000
|
|
|
2.50
|
|
|
3.00
|
|
| Expired |
|
(1,008,812
|
) |
|
7.06
|
|
|
-
|
|
|
Balance, July 31, 2013
|
|
3,150,000
|
|
$
|
2.25
|
|
|
2.90
|
|
us-gaap:ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock