The following is a summary of outstanding warrants at December 31, 2013:
| Common Shares | ||||||||||||||||||
| Total | Currently Exercisable |
Price per Share |
Expiration Date | |||||||||||||||
|
(1) |
Warrants related to February 2012 financing |
419,451 | 419,451 | $ | 16.20 | February 22, 2017 | ||||||||||||
|
(2) |
Warrants related to November 2012 financing | 8,333 | 8,333 | 4.50 | November 26, 2015 | |||||||||||||
|
(3) |
Warrants related to December 2012 financing | 15,625 | 15,625 | 4.50 | December 18, 2015 | |||||||||||||
|
(4) |
Warrants related to April 2013 financing | 256,914 | — | 5.45 | April 26, 2015 | |||||||||||||
|
(5) |
Warrants related to April 2013 financing | 256,913 | — | 5.45 | April 26, 2019 | |||||||||||||
|
(6) |
Warrants related to August 2013 financing | 117,670 | — | 2.25 | August 5, 2016 | |||||||||||||
|
(7) |
Warrants related to August 2013 financing | 6,675,676 | 6,675,676 | 2.57 | August 9, 2018 | |||||||||||||
|
(8) |
Warrants related to August 2013 financing | 3,337,838 | 3,337,838 | 2.57 | August 9, 2015 | |||||||||||||