Consolidated Balance Sheets (Unaudited) - USD ($)		Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents		$ 5,655,200	$ 4,921,545
Contracts and grants receivable		1,697,632	1,985,212
Prepaid expenses		225,614	244,267
Total current assets		7,578,446	7,151,024
Office furniture and equipment, net		33,050	47,366
Intangible assets, net		142,308	188,732
Total assets		7,753,804	7,387,122
Current liabilities:
Accounts payable		3,120,384	2,869,392
Accrued expenses		1,075,835	1,510,544
Notes payable			292,719
Warrant liability		1,324,909	2,434,101
Accrued compensation		62,245	298,675
Total current liabilities		5,583,373	7,405,431
Commitments and contingencies
Shareholders' equity (deficiency):
Preferred stock, 350,000 shares authorized; none issued or outstanding
Common stock, $.001 par value; 10,000,000 shares and 5,000,000 shares authorized at September 30, 2016 and December 31, 2015, respectively; 3,754,224 shares and 3,126,952 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively(1)	[1]	3,755	3,127
Additional paid-in capital(1)	[1]	151,959,679	146,856,143
Accumulated deficit		(149,793,003)	(146,877,579)
Total shareholders' equity (deficiency)		2,170,431	(18,309)
Total liabilities and shareholders' equity (deficiency)		$ 7,753,804	$ 7,387,122

[1] Adjusted to reflect the reverse stock split of one-for-ten effective October 7, 2016.