Warrants (Details) (Warrant Liability [Member], USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	6,033,050	6,033,050
Issued in March [Member]
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	2,640,534	2,640,534
Warrant Exercise Price	$ 6.25
Issued in March [Member] | Maximum [Member]
Class of Warrant or Right [Line Items]
Expiration Dates	Dec. 01, 2016
Issued in March [Member] | Minimum [Member]
Class of Warrant or Right [Line Items]
Expiration Dates	Oct. 01, 2015
Preferred Stock
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	76,120	76,120
Warrant Exercise Price	$ 2.50
Preferred Stock | Maximum [Member]
Class of Warrant or Right [Line Items]
Expiration Dates	Sep. 01, 2017
Preferred Stock | Minimum [Member]
Class of Warrant or Right [Line Items]
Expiration Dates	Nov. 01, 2015
Issued in June [Member]
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	6,113	6,113
Warrant Exercise Price	$ 22.50
Expiration Dates	Jun. 01, 2016
Issued in August [Member]
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	565,759	565,759
Warrant Exercise Price	$ 18.75
Expiration Dates	Aug. 01, 2016
Placement Agent [Member]
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	50,123	50,123
Warrant Exercise Price	$ 13.64
Expiration Dates	Aug. 01, 2016
Issued with Convertible Notes [Member]
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	1,125,578	1,125,578
Warrant Exercise Price	$ 2.50
Expiration Dates	Jun. 01, 2018
Series E Preferred Stock [Member]
Class of Warrant or Right [Line Items]
Warrants issued to purchase common stock	1,568,823	1,568,823
Warrant Exercise Price	$ 7.50
Expiration Dates	Sep. 01, 2018