Subsequent Events (Details) (USD $)	12 Months Ended		2 Months Ended	3 Months Ended			3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Feb. 28, 2013 Aspire Capital Purchase Agreement [Member]	Mar. 31, 2014 Aspire Capital Purchase Agreement [Member] Issuance of Equity [Member]	Mar. 11, 2014 Aspire Capital Purchase Agreement [Member] Issuance of Equity [Member]	Mar. 07, 2014 Aspire Capital Purchase Agreement [Member] Issuance of Equity [Member]	Mar. 31, 2014 Stock Option [Member] Stock Options [Member]	Mar. 31, 2014 Underwriting Offering [Member] Warrant [Member]	Mar. 07, 2014 Underwriting Offering [Member] Warrant [Member]	Mar. 07, 2014 Stock Options [Member]
Subsequent Event [Line Items]
Common Stock, Shares, Issued	27,196,537	16,375,365	1,600,000			800,000
Proceeds from issuance of common stock	$ 58,736,166	$ 16,428,827	$ 11,100,000	$ 5,600,000
Class of Warrant or Right, Additional Number of Securities Called by Warrants or Rights									250,000
Exercise Price of Warrant Exercise									5.10
Net proceeds from exercise of warrants	3,028,241	6,604,418						1,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	4,780,658									4,800
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price										$ 6.20
Net proceeds from exercise of options	150,658	0					0
Committment Value Under Purchase Agreement					$ 30,000,000
Term Of Agreement In Months					0