|
Stockholders' Equity (Details 1) (USD $)
|
12 Months Ended |
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Stockholders Equity [Line Items] |
|
|
| Outstanding Number of Options, at January 1, 2013 |
14,787,287 |
|
| Granted Number of Options |
3,840,962 |
|
| Exercised Number of Options |
0 |
|
| Forfeited/Expired Number of Options |
(51,042) |
|
| Outstanding Number of Options, at December 31, 2013 |
18,577,207 |
14,787,287 |
| Exercisable Number of Options, at December 31, 2013 |
12,659,353 |
|
| Vested and expected to vest Number of Options |
18,577,207 |
|
| Outstanding Weighted-Average Exercise Price, at January 1, 2013 |
$ 1.98 |
|
| Granted Weighted-Average Exercise Price |
$ 1.11 |
|
| Exercised Weighted-Average Exercise Price |
$ 0 |
|
| Forfeited Weighted-Average Exercise Price |
$ 2.72 |
|
| Outstanding Weighted-Average Exercise Price, at December 31, 2013 |
$ 1.79 |
$ 1.98 |
| Exercisable Weighted-Average Exercise Price, at December 31, 2013 |
$ 2.14 |
|
| Vested and expected to vest Weighted-Average Exercise Price |
$ 1.79 |
|
| Outstanding Weighted-Average Remaining Contractual Life (in Years) |
5 years 9 months 18 days |
6 years 1 month 6 days |
| Exercisable Weighted-Average Remaining Contractual Life (in Years), at December 31, 2013 |
4 years 6 months |
|
| Vested and expected to vest Weighted-Average Remaining Contractual Life (in Years) |
5 years 9 months 18 days |
|
| Outstanding Aggregate Intrinsic Value, at January 1, 2013 |
$ 1,926,000 |
|
| Outstanding Aggregate Intrinsic Value, at December 31, 2013 |
24,000,710 |
1,926,000 |
| Exercisable Aggregate Intrinsic Value, at December 31, 2013 |
12,938,385 |
|
| Vested and expected to vest Aggregate Intrinsic Value |
$ 24,000,710 |
|