Stockholders' Equity and Redeemable Convertible Preferred Stock (Details) - $ / shares	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Par Value	$ 0.0001	$ 0.0001
Series A Preferred Stock [Member]
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	N/A
Series C Convertible Preferred Stock [Member]
Preferred stock, shares issued	1	1
Preferred stock, shares outstanding	1	1
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	1:1
Series D Preferred Stock [Member]
Preferred stock, shares issued	4,725	4,725
Preferred stock, shares outstanding	4,725	4,725
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	10:1
Series D-1 Convertible Preferred Stock [Member]
Preferred stock, shares issued	834	834
Preferred stock, shares outstanding	834	834
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	10:1
Series F-1 Convertible Preferred Stock [Member]
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	1:1
Series H Convertible Preferred Stock [Member]
Preferred stock, shares issued	439,043	439,043
Preferred stock, shares outstanding	439,043	439,043
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	10:1
Series I Redeemable Convertible Preferred Stock [Member]
Preferred stock, shares issued	29,940	35,541
Preferred stock, shares outstanding	29,940	35,541
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	20:1
Series J Convertible Preferred Stock [Member]
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Par Value	$ 0.0001	$ 0.0001
Conversion Ratio	1:1