| | |
Closing date of private placement | |
|
| | |
09/30/11 | |
11/19/12 | |
12/17/12 | |
02/04/13 | |
06/21/13 | |
08/15/13 | |
10/09/13 | |
Total warrant liability |
| Ending balance at December 31, 2011 | |
$ | 2,361,925 | | |
$ | — | | |
$ | — | | |
$ | — | | |
$ | — | | |
$ | — | | |
$ | — | | |
$ | 2,361,925 | |
| Issuance of derivative warrants in private placement | |
| — | | |
| 1,345,150 | | |
| 312,978 | | |
| — | | |
| — | | |
| — | | |
| — | | |
| 1,658,128 | |
| Exercise or expiration | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | |
| Change in fair value of warrant liability | |
| (2,288,374 | ) | |
| (282,499 | ) | |
| 72,276 | | |
| — | | |
| — | | |
| — | | |
| — | | |
| (2,498,597 | ) |
| Reclassification of warrant from liability to equity | |
| (73,551 | ) | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| (73,551 | ) |
| Ending balance at December 31, 2012 | |
| — | | |
| 1,062,651 | | |
| 385,254 | | |
| — | | |
| — | | |
| — | | |
| — | | |
| 1,447,905 | |
| Issuance of derivative warrants in private placement | |
| — | | |
| — | | |
| — | | |
| 270,790 | | |
| 5,671 | | |
| — | | |
| — | | |
| 276,461 | |
| Exercise or expiration | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | |
| Reclassification of warrant from equity to liability | |
| — | | |
| — | | |
| — | | |
| — | | |
| — | | |
| 6,714 | | |
| 1,384 | | |
| 8,098 | |
| Change in fair value of warrant liability | |
| — | | |
| (893,050 | ) | |
| (323,458 | ) | |
| (210,654 | ) | |
| (3,373 | ) | |
| (1,121 | ) | |
| (188 | ) | |
| (1,431,844 | ) |
| Ending balance at December 31, 2013 | |
$ | — | | |
$ | 169,601 | | |
$ | 61,796 | | |
$ | 60,136 | | |
$ | 2,298 | | |
$ | 5,593 | | |
$ | 1,196 | | |
$ | 300,620 | |
