Stockholders' Equity (Details 9) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Warrants issued in connection with Notes		21,667
Warrants issued with purchase of Series D Preferred	21,418	18,989
Warrants issued in the Series D Preferred exchange		10,454
Warrants issued with line of credit	11,564
Contingent Warrants issued	120,785
Number of warrants issued	153,767	51,110
Related Party [Member]
Class of Warrant or Right [Line Items]
Warrants issued in connection with Notes		19,584
Warrants issued with purchase of Series D Preferred	6,159	9,561
Warrants issued in the Series D Preferred exchange		2,827
Contingent Warrants issued	34,062
Number of warrants issued	40,221	31,972
Other Holders [Member]
Class of Warrant or Right [Line Items]
Warrants issued in connection with Notes		2,083
Warrants issued with purchase of Series D Preferred	15,259	9,428
Warrants issued in the Series D Preferred exchange		7,627
Warrants issued with line of credit	11,564
Contingent Warrants issued	86,723
Number of warrants issued	113,546	19,138