|
A summary of stock option activity is as follows (Details)
|
Shares
|
Weighted Average Exercise Price
|
Weighted Average Remaining Contractual Terms
|
Aggregate Instrinsic Value
|
|---|---|---|---|---|
| Options outstanding at Dec. 31, 2012 | 1,986,255 | 8.95 | 7.9 | |
| Options Granted | 3,090,900 | 0.40 | 9.6 | |
| Options Exercised | 0 | |||
| Options Forfeited | (340,837) | 6.41 | ||
| Options Expired | (32,992) | 51.05 | ||
| Options exercisable | 1,193,800 | 10.45 | 6.7 | |
| Options unvested | 3,509,526 | 0.77 | 9.4 | 2,751,453 |
| Options outstanding at Dec. 31, 2013 | 4,703,326 | 3.22 | 8.7 |