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Consolidated Balance Sheets (USD $)
Dec. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 2,513,861 $ 1,035,925
Grant funds receivable 140,909 266,248
Prepaid expenses and other current assets 43,569 42,301
Total current assets 2,698,339 1,344,474
Property and equipment, net 120,227 102,486
Other assets 21,010 31,010
Total assets 2,839,576 1,477,970
Current liabilities:    
Accounts payable 155,943 163,788
Accrued expenses 96,406 33,877
Amounts payable to Emory University (a related party) 60,000 129,370
Total current liabilities 312,349 327,035
Commitments (Note 6)      
Common stock, $.001 par value:    
Issued and outstanding shares – 23,765,180 and 18,733,277 at December 31, 2013 and 2012, respectively 23,765 18,733
Additional paid-in capital 28,239,392 25,587,148
Deficit accumulated during the development stage (27,052,085) (24,767,142)
Total stockholders’ equity 2,527,227 1,150,935
Total liabilities and stockholders’ equity 2,839,576 1,477,970
Series A Convertible Preferred Stock [Member]
    
Current liabilities:    
Preferred stock 60,586 312,196
Series B Convertible Preferred Stock [Member]
    
Current liabilities:    
Preferred stock $ 1,255,569