CONDENSED BALANCE SHEETS (Unaudited) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 11,859,009	$ 17,988,590
Marketable securities	15,067,770	18,057,672
Receivable	20,758	175,704
Interest receivable	22,171	41,275
Prepaid expenses and other current assets	918,821	1,017,799
Total current assets	27,888,529	37,281,040
Equipment and furnishings, net	321,102	266,335
Goodwill	183,780	183,780
Other assets	119,921	123,268
Total assets	28,513,332	37,854,423
Current liabilities:
Accounts payable	2,232,148	2,074,463
Accrued expenses and other current liabilities	5,403,039	4,786,956
Warrant liabilities	19,155,292	6,738,934
Total current liabilities	26,790,479	13,600,353
Stockholders' equity (2011 restated to reflect a 1-7 reverse common stock split, see Note 1):
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; 21,296,913 shares issued and outstanding at June 30, 2012 and 21,294,413 shares issued and outstanding at December 31, 2011	21,296	21,294
Additional paid-in capital	238,318,443	237,452,308
Treasury stock, at cost (90,546 shares)	(2,279,238)	(2,279,238)
Accumulated deficit	(234,337,648)	(210,940,294)
Total stockholders' equity	1,722,853	24,254,070
Total liabilities and stockholders' equity	$ 28,513,332	$ 37,854,423