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Net Loss per Share (Details Textual)	3 Months Ended
Net Loss per Share (Details Textual)	Mar. 31, 2015	Mar. 31, 2014
Equity Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6,531,106	4,490,497
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	7,974,794	963,168

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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