Net Loss Per Share Of Common Stock, Basic And Diluted - Anti-dilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Series A Convertible preferred stock
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding		31,116,391
Series A-1 Convertible preferred stock
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding		9,074,511
Series B convertible preferred stock
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding		58,948,735
Stock Options
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding	1,450,952	492,131
Warrants on Common Stock
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding	7,400,934	681,858
Warrants on Preferred Stock
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding		625,208
Investor Rights Obligation
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding		53,351,117
Underwriters Unit Purchase Option
Anti-dilutive securities
Anti- dilutive securities excluded from the computation of diluted weighted shares outstanding	40,000