Shareholders' Equity (Details) (USD $)	3 Months Ended	12 Months Ended					12 Months Ended					0 Months Ended
	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Mar. 11, 2014	Jun. 30, 2013	Nov. 19, 2010	Dec. 31, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2013 Warrant holder A [Member]	Sep. 30, 2011 Aspire Capital Purchase Agreement [Member]	Sep. 28, 2011 Aspire Capital Purchase Agreement [Member]	Sep. 30, 2012 Private Placement [Member]	Oct. 10, 2012 Non US Equity Plan [Member] Employee Stock Option [Member]	Oct. 14, 2011 Non US Equity Plan [Member] Employee Stock Option [Member]	Jun. 02, 2010 Non US Equity Plan [Member] Employee Stock Option [Member]	Oct. 29, 2009 Non US Equity Plan [Member] Employee Stock Option [Member]	Oct. 31, 2013 2009 Equity Plan [Member] Employee Stock Option [Member]	Oct. 10, 2012 2009 Equity Plan [Member] Employee Stock Option [Member]	Oct. 14, 2011 2009 Equity Plan [Member] Employee Stock Option [Member]	Jan. 18, 2011 2009 Equity Plan [Member] Employee Stock Option [Member]	Jun. 02, 2010 2009 Equity Plan [Member] Employee Stock Option [Member]	Oct. 29, 2009 2009 Equity Plan [Member] Employee Stock Option [Member]	May 09, 2009 2009 Equity Plan [Member] Employee Stock Option [Member]
Class of Stock [Line Items]
Common Stock, Shares Authorized		500,000,000	500,000,000										570,000	570,000	870,000	470,000	2,600,000	450,000	2,375,000	1,775,000	1,375,000	975,000	380,000
weighted average estimated fair value of restricted stock	$ 5.77	$ 6.53
Stock Issued During Period, Shares, Restricted Stock Award, Gross		514,700	229,553
Stock Issued During Period, Shares, New Issues							9,712,724	3,573,229
Common Stock, Par or Stated Value Per Share		$ 0.001	$ 0.001	$ 0.001
Proceeds from Warrant Exercises		$ 3,028,241	$ 6,604,418
Warrant inducements		0	(1,012,819)
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									600,000
Proceeds from Issuance of Warrants									3,000,000
Warrant inducements		40,407	41,969				0	145,895				161,290
Investment Warrants, Exercise Price												$ 6.00
Committment Value Under Purchase Agreement											20,000,000
Term Of Agreement In Months											24
Discount Applied To Weighted Average Price											5.00%
Shares, Issued										99,010
Sale of Stock, Price Per Share					$ 5.60	$ 0.945
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ 3,360,000	$ 1,325,100