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Stockholders' Equity (Details 5) (Warrant [Member], USD $)
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12 Months Ended |
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Dec. 31, 2013
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Dec. 31, 2012
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Warrant [Member]
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| Stockholders Equity [Line Items] |
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| Outstanding Number of Warrants at January 1, 2013 |
19,840,176 |
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| Granted Number of Warrants |
7,761,211 |
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| Exercised Number of Warrants |
(5,302,935) |
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| Forfeited Number of Warrants |
(2,711,633) |
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| Outstanding Number of Warrants at December 31, 2013 |
19,586,819 |
19,840,176 |
| Exercisable Number of Warrants |
17,992,219 |
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| Outstanding Weighted-Average Exercise Price, at January 1, 2013 |
$ 2.08 |
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| Granted Weighted-Average Exercise Price |
$ 1.83 |
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| Exercised Weighted-Average Exercise Price |
$ 1.30 |
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| Forfeited Weighted Average Exercise Price |
$ 3.10 |
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| Outstanding Weighted-Average Exercise Price, at December 31, 2013 |
$ 1.96 |
$ 2.08 |
| Exercisable Weighted-Average Exercise Price, at December 31, 2013 |
$ 1.80 |
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| Outstanding Weighted-Average Remaining Contractual Life (in years) |
3 years 4 months 24 days |
3 years 6 months |
| Granted Weighted-Average Remaining Contractual Life (in years) |
4 years |
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| Exercisable Weighted-Average Remaining Contractual Life (in years), at December 31, 2013 |
3 years |
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| Outstanding Aggregate Intrinsic Value, at January 1, 2013 |
$ 854,649 |
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| Outstanding Aggregate Intrinsic Value, at December 31, 2013 |
21,146,495 |
854,649 |
| Exercisable Aggregate Intrinsic Value, at December 31, 2013 |
$ 19,695,409 |
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