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Net Loss Per Share (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Anti-dilutive securities |  |  |  |
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive | 6,086,377 | 5,360,999 | 6,086,377 | 5,360,999
Stock options |  |  |  |
Anti-dilutive securities |  |  |  |
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive | 6,077,377 | 5,351,999 | 6,077,377 | 5,351,999
Restricted stock |  |  |  |
Anti-dilutive securities |  |  |  |
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive | 9,000 | 9,000 | 9,000 | 9,000

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- 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 -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 Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 3: 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 4: 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 + Details
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