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Condensed Consolidated Statements of Operations (Unaudited) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Grant revenue $ 103,424us-gaap_RevenueFromGrants $ 157,340us-gaap_RevenueFromGrants
Operating expenses:    
Research and development 403,629us-gaap_ResearchAndDevelopmentExpense 402,860us-gaap_ResearchAndDevelopmentExpense
General and administrative 401,441us-gaap_GeneralAndAdministrativeExpense 371,802us-gaap_GeneralAndAdministrativeExpense
Total operating expenses 805,070us-gaap_OperatingExpenses 774,662us-gaap_OperatingExpenses
Loss from operations (701,646)us-gaap_OperatingIncomeLoss (617,322)us-gaap_OperatingIncomeLoss
Other income:    
Interest income 1,192us-gaap_InvestmentIncomeInterest 1,404us-gaap_InvestmentIncomeInterest
Net loss $ (700,454)us-gaap_NetIncomeLoss $ (615,918)us-gaap_NetIncomeLoss
Basic and diluted:    
Loss per common share (in dollars per share) $ (0.02)us-gaap_EarningsPerShareBasicAndDiluted $ (0.02)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average shares outstanding (in shares) 31,950,813us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 24,765,307us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted