Equity Warrants to Purchase Common Stock (Details)	12 Months Ended
	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding	2,887,500,000
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right	1.03
Class of Warrant or Right, Exercise Price of Warrants or Rights	7.804
Class of Warrant or Right, Date from which Warrants or Rights Exercisable	Nov. 21, 2008
Class of Warrant or Right, Date until which Warrants or Rights Exercisable	Nov. 21, 2018