Loss Per Share of Common Stock (Details) - shares	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	1,410,712	9,198,067
Convertible preferred stock.
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)		7,661,868
Warrants
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)		470,026
Stock options
Loss per share of common stock
Antidilutive securities excluded from the computation of diluted weighted average shares outstanding (in shares)	1,410,712	1,066,173