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