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Summary of Significant Accounting Policies (Details 3)	12 Months Ended
Summary of Significant Accounting Policies (Details 3)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net loss per common share
Total shares excluded from calculation	2,618,109	2,989,949	2,587,516
Stock options
Net loss per common share
Total shares excluded from calculation	949,685	463,023	502,249
Restricted Stock Units
Net loss per common share
Total shares excluded from calculation	119,248	39,377	38,089
Convertible preferred stock
Net loss per common share
Total shares excluded from calculation	20,381	73,747	73,747
Contingently issuable common stock and common stock warrants associated with Economic Rights
Net loss per common share
Total shares excluded from calculation		440,375
Common stock warrants
Net loss per common share
Total shares excluded from calculation	1,591,795	1,973,427	1,973,431

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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