Stock-Based Compensation (Details Textual) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended		3 Months Ended				12 Months Ended	3 Months Ended		12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Employee Stock Option [Member]	Dec. 31, 2013 Employee Stock Option [Member]	Dec. 31, 2012 Employee Stock Option [Member]	Mar. 31, 2014 General and Administrative Expenses and Research and Development Expense [Member]	Mar. 31, 2013 General and Administrative Expenses and Research and Development Expense [Member]	Mar. 31, 2014 Employees And Consultants [Member]	Mar. 31, 2014 2001 Stock Plan [Member]	Dec. 31, 2001 2001 Stock Plan [Member] Maximum [Member]	Mar. 31, 2014 2007 Stock Plan [Member]	Mar. 20, 2007 2007 Stock Plan [Member]	Dec. 31, 2007 2007 Stock Plan [Member] Maximum [Member]	Mar. 31, 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			4,490,497	3,909,580	4,453,746				953,507		436,990	2,500,000		3,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		185,000						587,500	953,507	250,000	436,990		250,000	3,100,000	3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value								$ 1,400,000
Allocated Share-based Compensation Expense		117,500				362,000	457,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 2,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term			5 years 6 months 18 days	5 years 7 months 2 days	6 years 5 months 5 days
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	2017 years
Common Stock, Capital Shares Reserved for Future Issuance																6,000,000	3,000,000