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Net Loss Per Share (Details 1) - shares	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share Basic [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	28,008,046	11,021,717
Outstanding stock options
Earnings Per Share Basic [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,199,029	1,040,015
Unvested restricted stock units
Earnings Per Share Basic [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	629,383	610,700
Warrants to purchase common stock
Earnings Per Share Basic [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	26,179,634	9,371,002

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Antidilution



-URI http://asc.fasb.org/extlink&oid=6505113



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Diluted Earnings Per Share



-URI http://asc.fasb.org/extlink&oid=6510752



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Contingent Stock Agreement



-URI http://asc.fasb.org/extlink&oid=6508534



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 260



-SubTopic 10



-Section 50



-Paragraph 1



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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