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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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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Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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