Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 5,022,165	$ 5,575,310
Trade accounts receivable, net of allowance of $8,174 and $65,000	167,045	285,859
Grants receivable		270,128
Other receivables	81,975	74,110
Prepaid research expenses	211,934	464,322
Prepaid expenses and other assets	3,140	155,261
Total current assets	5,486,259	6,824,990
Property and equipment, net of accumulated depreciation of $248,642 and $197,971	108,342	154,161
Patents, net of accumulated amortization of $2,044 and $50,725	102	2,296
Deposit	35,625	35,625
Total assets	5,630,328	7,017,072
Current liabilities
Accounts payable and accrued expenses	250,383	1,211,561
Accrued salaries and benefits	432,052	563,706
Deferred revenue	68,442	170,641
Total current liabilities	750,877	1,945,908
Deferred compensation		550,000
Deferred rent	56,276	80,945
Total liabilities	807,153	2,576,853
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value, 2,000,000 shares authorized; 5,250 series B issued and 1 outstanding at September 30, 2011 and December 31, 2010
Common stock, $0.01 par value, 5,000,000 shares authorized; 2,570,531 and 2,143,631 issued, 2,562,488 and 2,135,588 outstanding at September 30, 2011 and December 31, 2010, respectively	25,705	21,436
Paid-in capital in excess of par value	41,109,894	38,568,814
Treasury stock, 8,043 shares, at cost at September 30, 2011 and December 31, 2010	(464,786)	(464,786)
Accumulated deficit	(35,847,638)	(33,685,245)
Total stockholders' equity	4,823,175	4,440,219
Total liabilities and stockholders' equity	$ 5,630,328	$ 7,017,072