| |
Number of Warrants |
Weighted- Average Exercise Price |
|||||
|---|---|---|---|---|---|---|---|
|
Warrants outstanding as of December 31, 2010 |
37,053 | $ | 6.49 | ||||
|
Warrants expired |
(32,053 | ) | 6.07 | ||||
|
Warrants outstanding as of December 31, 2011 |
5,000 | $ | 9.18 | ||||
|
Warrants expired |
(5,000 | ) | 9.18 | ||||
|
Warrants outstanding as of December 31, 2012 |
— | $ | — | ||||
|
Warrants expired |
— | — | |||||
|
Warrants outstanding as of December 31, 2013 |
— | $ | — | ||||