CONDENSED BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 19,608	$ 24,387
Interest, income taxes and other current assets	170	643
Total current assets	19,778	25,030
Furniture and equipment, net	214	258
Total assets	19,992	25,288
LIABILITIES, POTENTIALLY REDEEMABLE EQUITY AND STOCKHOLDERS' EQUITY
Accounts payable	385	246
Accrued compensation	637	674
Accrued clinical and other accrued liabilities	140	236
Share-based payments liability	0	660
Total current liabilities	1,162	1,816
Potentially redeemable equity - See Note B	0	15,556
Stockholders' Equity
Common Stock $.0005 par value; 100,000,000 shares authorized; 40,775,411 shares in 2011and 2010 issued and outstanding	20	20
Additional paid-in capital	189,022	188,258
Accumulated deficit ($142,450 at June 30, 2011 and $152,600 at December 31, 2010, accumulated during development stage period)	(170,212)	(180,362)
Total stockholders' equity	18,830	7,916
Total liabilities, potentially redeemable equity and stockholders' equity	$ 19,992	$ 25,288