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Loss Per Share (Details) | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Warrants |  |
Class of Stock [Line Items] |  |
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares | 4,491,028 | 5,501,055
Stock Options [Member] |  |
Class of Stock [Line Items] |  |
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares | 3,912,697 | 2,631,181
Restricted Stock [Member] |  |
Class of Stock [Line Items] |  |
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares | 175,731 | 35,500

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