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Condensed Consolidated Balance Sheets (USD $)
Mar. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 1,751,436 $ 1,035,925
Grant funds receivable 213,814 266,248
Prepaid expenses and other current assets 48,549 42,301
Total current assets 2,013,799 1,344,474
Property and equipment, net of accumulated depreciation and amortization of $444,854 and $429,804 at March 31, 2013 and December 31, 2012, respectively 87,436 102,486
Other assets:    
Licenses, net of accumulated amortization of $231,356 and $228,856 at March 31, 2013 and December 31, 2012, respectively 17,500 20,000
Deposits and other assets 11,010 11,010
Total other assets 28,510 31,010
Total assets 2,129,745 1,477,970
Current liabilities:    
Accounts payable 110,719 163,788
Accrued expenses 29,543 33,877
Amounts payable to Emory University (a related party) 209,520 129,370
Total current liabilities 349,782 327,035
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 March 31, 2013 and December 31, 2012 312,196 312,196
Common stock, $0.001 par value, 40,000,000 shares authorized; 20,499,944 and 18,733,277 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively 20,500 18,733
Additional paid-in capital 26,911,206 25,587,148
Deficit accumulated during the development stage (25,463,939) (24,767,142)
Total stockholders’ equity 1,779,963 1,150,935
Total liabilities and stockholders’ equity $ 2,129,745 $ 1,477,970