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Net Loss Per Common Share (Details 2) - shares	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Stock options
Anti-dilutive securities
Potentially dilutive securities outstanding excluded from the computations of diluted weighted-average shares outstanding (in shares)	803,565	317,019
Warrants
Anti-dilutive securities
Potentially dilutive securities outstanding excluded from the computations of diluted weighted-average shares outstanding (in shares)	18,809	6,262
All series of convertible redeemable preferred stock
Anti-dilutive securities
Potentially dilutive securities outstanding excluded from the computations of diluted weighted-average shares outstanding (in shares)	6,038,636	6,552,820
Restricted stock
Anti-dilutive securities
Potentially dilutive securities outstanding excluded from the computations of diluted weighted-average shares outstanding (in shares)	78,141	54,832

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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