CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 17,988,590	$ 6,324,430
Marketable securities	18,057,672	20,567,861
Proceeds from sale of RXi	0	6,938,603
Receivable	175,704	259,006
Income taxes recoverable	0	519,158
Interest receivable	41,275	117,624
Prepaid expenses and other current assets	1,017,799	1,247,145
Total current assets	37,281,040	35,973,827
Equipment and furnishings, net	266,335	319,191
Goodwill	183,780	183,780
Other assets	123,268	220,292
Total assets	37,854,423	36,697,090
Current liabilities:
Accounts payable	2,074,463	1,027,924
Accrued expenses and other current liabilities	4,786,956	2,663,910
Warrant liabilities	6,738,934	2,437,281
Total current liabilities	13,600,353	6,129,115
Commitment and contingencies
Stockholders' equity:
Preferred Stock, $.01 par value, 5,000,000 shares authorized, including 25,000 shares of Series A Junior Participating Preferred Stock; no shares issued and outstanding	0	0
Common stock, $.001 par value, 250,000,000 shares authorized; 149,060,885 and 109,840,445 shares issued and outstanding at December 31, 2011 and 2010, respectively	149,057	109,840
Additional paid-in capital	237,324,545	229,253,122
Treasury stock, at cost (633,816 shares held, at December 31, 2011 and 2010)	(2,279,238)	(2,279,238)
Accumulated deficit	(210,940,294)	(196,515,749)
Total stockholders' equity	24,254,070	30,567,975
Total liabilities and stockholders' equity	$ 37,854,423	$ 36,697,090