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Condensed Consolidated Balance Sheets (USD $)
Jun. 30, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 1,881,393 $ 1,035,925
Grant funds receivable 35,750 266,248
Prepaid expenses and other current assets 28,683 42,301
Total current assets 1,945,826 1,344,474
Property and equipment, net of accumulated depreciation and amortization of $459,905 and $429,804 at June 30, 2013 and December 31, 2012, respectively 72,385 102,486
Other assets:    
Licenses, net of accumulated amortization of $233,856 and $228,856 at June 30, 2013 and December 31, 2012, respectively 15,000 20,000
Deposits and other assets 11,010 11,010
Total other assets 26,010 31,010
Total assets 2,044,221 1,477,970
Current liabilities:    
Accounts payable 38,779 163,788
Accrued expenses 87,834 33,877
Amounts payable to Emory University (a related party) 25,000 129,370
Total current liabilities 151,613 327,035
Commitments (Note 4)      
Stockholders’ equity:    
Preferred stock, $0.01 par value, 10,000,000 shares authorized; Series A Convertible Preferred Stock, $1,000 stated value; 788 shares issued and outstanding at June 30, 2013 and December 31, 2012, respectively 312,196 312,196
Common stock, $0.001 par value, 40,000,000 shares authorized; 21,666,610 and 18,733,277 shares issued and outstanding at June 30, 2013 and December 31, 2012, respectively 21,667 18,733
Additional paid-in capital 27,548,968 25,587,148
Deficit accumulated during the development stage (25,990,223) (24,767,142)
Total stockholders’ equity 1,892,608 1,150,935
Total liabilities and stockholders’ equity $ 2,044,221 $ 1,477,970