CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 6,579	$ 7,968
Investments, at fair value	3,326	6,724
Accounts receivable, net	263	325
Prepaid expenses and other	339	219
Total current assets	10,507	15,236
Property and equipment, net	248	276
Restricted cash	97	97
Total assets	10,852	15,609
Current liabilities:
Accounts payable	938	1,146
Accrued expenses and other	755	1,076
Total current liabilities	1,693	2,222
Other liabilities	91	89
Total liabilities	$ 1,784	$ 2,311
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000 shares authorized; none issued and outstanding in 2015 and 2014
Common stock, $0.001 par value; 30,000 shares authorized; 17,264 and 17,270 shares issued and outstanding at September 30, 2015 and at December 31, 2014	$ 17	$ 17
Additional paid-in capital	292,287	291,609
Accumulated other comprehensive loss	(38)	(33)
Accumulated deficit	(283,198)	(278,295)
Total stockholders' equity	9,068	13,298
Total liabilities and stockholders' equity	$ 10,852	$ 15,609