BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 7,015	$ 7,968
Investments - available for sale, at fair value	1,661	6,724
Accounts receivable, net	166	325
Prepaid expenses and other	245	219
Total current assets	9,087	15,236
Property and equipment, net	279	276
Other assets	97	97
Total assets	9,463	15,609
Current liabilities:
Accounts payable	1,096	1,146
Accrued expenses and other	598	1,076
Total current liabilities	1,694	2,222
Other long term liabilities	89	89
Total liabilities	$ 1,783	$ 2,311
Commitments and Contingencies
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000 shares authorized in 2015 and 2014; none issued and outstanding in 2015 and 2014
Common stock, $0.001 par value; 55,000 shares authorized in 2015 and 30,000 shares authorized in 2014; 17,264 and 17,270 shares issued and outstanding in 2015 and 2014	$ 17	$ 17
Additional paid-in capital	292,508	291,609
Accumulated other comprehensive loss	(5)	(33)
Accumulated deficit	(284,840)	(278,295)
Total stockholders' equity	7,680	13,298
Total liabilities and stockholders' equity	$ 9,463	$ 15,609