Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash	$ 3,579	$ 6,331
Prepaid expenses and other current assets	106	261
Total current assets	3,685	6,592
Property and equipment, net	38	79
Other long term assets	37	35
Total assets	3,760	6,706
Current liabilities
Accounts payable	235	58
Accrued expenses	644	650
Accrued compensation	272	863
Deferred revenue	0	12
Current liabilities of discontinued operations	21	0
Total current liabilities	1,172	1,583
Warrant liabilities	0	694
Other long term liabilities	16	58
Total liabilities	1,188	2,335
Commitments and contingencies (note 11)
Stockholders’ equity
Preferred stock, $.001 par value, 10,000,000 shares authorized, no shares issued or outstanding as of December 31, 2018 and 2017	0	0
Common stock, $.001 par value, 60,000,000 and 30,000,000 shares authorized, 941,553 and 507,241 issued and outstanding as of December 31, 2018 and 2017, respectively	28	15
Additional paid-in-capital	327,773	320,343
Accumulated deficit	(325,229)	(315,987)
Total stockholders’ equity	2,572	4,371
Total liabilities and stockholders’ equity	$ 3,760	$ 6,706