Condensed Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash	$ 4,562	$ 4,946
Restricted cash	20	20
Prepaid expenses	337	135
Other current assets	86	142
Total current assets	5,005	5,243
Furniture and fixtures, equipment and leasehold improvements	371	370
Accumulated depreciation	(361)	(357)
Net furniture and fixtures, equipment and leasehold improvements	10	13
License agreements, net of accumulated amortization of $1,333 and $1,309 at March 31, 2013 and December 31, 2012, respectively	167	191
Total assets	5,182	5,447
Current liabilities:
Accounts payable	445	416
Accrued research and development	114	181
Accrued other	274	304
Total current liabilities	833	901
Commitments and contingencies
Stockholders' equity
Preferred stock, $.01 par value, 15,000 shares authorized; 0 shares issued and outstanding
Common stock, $.01 par value, 100,000 shares authorized; 2,075 and 1,746 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively	21	17
Additional paid-in capital	231,673	229,961
Stock subscription receivable	(33)
Accumulated deficit	(227,312)	(225,432)
Total stockholders' equity	4,349	4,546
Total liabilities and stockholders' equity	$ 5,182	$ 5,447