Stock-Based Compensation (Details Textual) (USD $)	12 Months Ended		1 Months Ended			12 Months Ended															12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Oct. 25, 2012 Warrant [Member]	Mar. 15, 2012 Warrant [Member]	Dec. 20, 2011 Warrant [Member]	Dec. 31, 2013 Warrant [Member]	Dec. 31, 2012 Warrant [Member]	Dec. 31, 2013 Epitope [Member]	Dec. 31, 2013 General and Administrative Expenses and Research and Development Expense [Member] Warrant [Member]	Dec. 31, 2012 General and Administrative Expenses and Research and Development Expense [Member] Warrant [Member]	Dec. 31, 2013 Employees And Directors [Member]	Dec. 31, 2012 Employees And Directors [Member]	Dec. 31, 2013 Employee [Member] General and Administrative Expenses and Research and Development Expense [Member]	Dec. 31, 2012 Employee [Member] General and Administrative Expenses and Research and Development Expense [Member]	Dec. 31, 2013 Consultant [Member] General and Administrative Expenses and Research and Development Expense [Member]	Dec. 31, 2012 Consultant [Member] General and Administrative Expenses and Research and Development Expense [Member]	Dec. 31, 2013 2001 Stock Plan [Member]	Dec. 31, 2001 2001 Stock Plan [Member] Maximum [Member]	Dec. 31, 2013 2007 Stock Plan [Member]	Mar. 20, 2007 2007 Stock Plan [Member]	Dec. 31, 2007 2007 Stock Plan [Member] Maximum [Member]	Dec. 31, 2013 2010 Stock Plan [Member]	Nov. 02, 2010 2010 Stock Plan [Member]	Dec. 31, 2013 2010 Stock Plan [Member] Maximum [Member]	Dec. 31, 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								50,000									953,507		443,573	2,500,000		2,512,500	3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	222,500										222,500	2,075,000					953,507	250,000	443,573		250,000	2,512,500		6,000,000	3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value											$ 350,000	$ 4,500,000
Allocated Share-based Compensation Expense									0	271,000			1,300,000	1,400,000	324,000	216,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	1,600,000
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	231,000	127,000
Issuance of Warrants to Purchase of Common Stock			635,855
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms			5 years
Warrants Exercise Price Per Share			$ 1.60
Investment Warrants Expiration Date			Oct. 25, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Warrants, Exercisable Number				250,000	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Warrants, Vested and Expected to Vest Outstanding, Number				50,000
Warrants Exercisable Price Per Share				$ 2.20
Share-based Compensation Arrangement by Share-based Payment Award, Warrants, Exercisable in Period				2 years	5 years
Issuance of Warrants Expenses Recognized						0	63,000
Fair Value Warrants					$ 200,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number								40,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price								$ 0.001
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term								4 years 6 months