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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Significant Accounting Policies

Schedule of antidilutive shares excluded from computation of diluted net loss per share

		Year ended December 31, 2010		Year ended December 31, 2011		Year ended December 31, 2012
Stock options		498,562		502,249		463,023
Restricted Stock and Restricted Stock Units		8,555		38,089		39,377
Convertible preferred stock		73,747		73,747		73,747
Contingently issuable shares and common stock warrants associated with Economic Rights		—		—		440,375
Options issued in connection with the October 2010 financing		891,771		—		—
Common stock warrants		1,429,313		1,973,431		1,973,427
Total shares excluded from calculation		2,901,948		2,587,516		2,989,949

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- Definition

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

+ References

Reference 1: 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



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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