Stock-Based Compensation (Details Textual) (USD $)					3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended					12 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Employee Stock Option [Member]	Dec. 31, 2013 Employee Stock Option [Member]	Dec. 31, 2012 Employee Stock Option [Member]	Jun. 30, 2014 General and Administrative Expenses and Research and Development Expense [Member]	Jun. 30, 2013 General and Administrative Expenses and Research and Development Expense [Member]	Jun. 30, 2014 General and Administrative Expenses and Research and Development Expense [Member]	Jun. 30, 2013 General and Administrative Expenses and Research and Development Expense [Member]	Jun. 30, 2014 General and Administrative Expenses and Research and Development Expense [Member] Warrant [Member]	Jun. 30, 2013 General and Administrative Expenses and Research and Development Expense [Member] Warrant [Member]	Jun. 30, 2014 General and Administrative Expenses and Research and Development Expense [Member] Warrant [Member]	Jun. 30, 2013 General and Administrative Expenses and Research and Development Expense [Member] Warrant [Member]	Jun. 30, 2014 Employees And Consultants [Member]	Jun. 30, 2013 Employees And Consultants [Member]	Jun. 30, 2014 2001 Stock Plan [Member]	Dec. 31, 2001 2001 Stock Plan [Member] Maximum [Member]	Jun. 30, 2014 2007 Stock Plan [Member]	Mar. 20, 2007 2007 Stock Plan [Member]	Dec. 31, 2007 2007 Stock Plan [Member] Maximum [Member]	Jun. 30, 2014 2010 Stock Plan [Member]	Dec. 31, 2010 2010 Stock Plan [Member]	Oct. 22, 2013 2010 Stock Plan [Member] Maximum [Member]	Oct. 22, 2013 2010 Stock Plan [Member] Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		5,331,106	3,909,580	4,453,746											682,449		428,657	2,500,000		4,220,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross													1,732,500	117,500	682,449	250,000	428,657		250,000	4,220,000	3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value													$ 4,100,000	$ 185,000
Allocated Share-based Compensation Expense					855,000	407,000	1,217,000	864,000	0	22,000	0	22,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 4,500,000
Common Stock, Capital Shares Reserved for Future Issuance																						6,000,000	3,000,000