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Net Income (Loss) per Common Share (Details 1)	3 Months Ended
Net Income (Loss) per Common Share (Details 1)	Mar. 31, 2015	Mar. 31, 2014
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded anti-dilutive stock options and warrants	5,009,848	16,820,281
Unvested restricted stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded anti-dilutive stock options and warrants	132,077	59,199
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Excluded anti-dilutive stock options and warrants	2,094,562	2,375,748

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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