Consolidated Statements of Operations (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenue:
Option Revenue	$ 377,453us-gaap_ContractsRevenue	$ 348,837us-gaap_ContractsRevenue
Research and development	2,636,999us-gaap_ResearchAndDevelopmentExpense	2,811,139us-gaap_ResearchAndDevelopmentExpense
General and administrative	1,006,130us-gaap_GeneralAndAdministrativeExpense	1,102,880us-gaap_GeneralAndAdministrativeExpense
Depreciation and amortization	96,982us-gaap_DepreciationAndAmortization	95,586us-gaap_DepreciationAndAmortization
Operating loss	(3,362,658)us-gaap_OperatingIncomeLoss	(3,660,768)us-gaap_OperatingIncomeLoss
Interest income	1,478us-gaap_InvestmentIncomeInterest	5,194us-gaap_InvestmentIncomeInterest
Other income, net	10,300us-gaap_OtherNonoperatingIncomeExpense	0us-gaap_OtherNonoperatingIncomeExpense
Net loss	$ (3,350,880)us-gaap_NetIncomeLoss	$ (3,655,574)us-gaap_NetIncomeLoss
Basic and diluted loss per share	$ (0.12)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.13)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average shares outstanding - Basic and diluted	28,234,751	27,584,615

Revenue earned during the period arising from products sold or services provided under the terms of a contract, not elsewhere specified in the taxonomy. May include government contracts, construction contracts, and any other contract related to a particular project or product.

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