Net Loss Attributable to Common Stockholders - Schedule of Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities	2,041,768	10,377,677	2,062,046	10,111,355
Convertible Preferred Series C
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities		9,234,560		8,967,953
Service Period Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities	1,980,651	1,082,000	2,000,929	1,082,285
Warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities	61,117	61,117	61,117	61,117