| | | | ||||||||||
| Issue date | | Number of warrants | | Exercise price | | Term | ||||||
| March 2009 | | | 12,445 | | | $ | 11.25 | | | | 7 years | |
| December 2011 | | | 123,585 | | | $ | 5.21 | | | | 7 years | |
| February 2012 | | | 3,700 | | | $ | 5.21 | | | | 6 years | |
| June 2012 | | | 17,267 | | | $ | 5.21 | | | | 7 years | |
| August 2012 | | | 112,536 | | | $ | 5.21 | | | | 7 years | |
| April 2013 | | | 161,327 | | | $ | 5.21 | | | | 7 years | |
| April 2013 | | | 3,977,290 | | | $ | 3.58 | | | | 7 years | |
| | | | 4,408,150 | | ||||||||