CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 2,572	$ 7,611
Investments available for sale	2,621	1,803
Accounts receivables	6	6
Prepaid expenses and other current assets	315	718
Total current assets	5,514	10,138
Other assets	1,721	1,604
Property and equipment, net	5	9
Total assets	7,240	11,751
Current liabilities:
Accounts payable and accrued liabilities	1,168	1,050
Accrued payroll and related expenses	292	277
Other current liabilities	140	140
Income tax liability	0	396
Total current liabilities	1,600	1,863
Commitments and contingencies (Note 4)
Stockholders' equity:
Preferred stock, par value $0.0001 per share Authorized: 10,000,000 shares at September 30, 2019 and December 31, 2018 Issued and outstanding: 0 shares at September 30, 2019 and December 31, 2018	0	0
Common stock, par value $0.0001 per share Authorized: 100,000,000 shares at September 30, 2019 and December 31, 2018 Issued and outstanding: 68,958,301 shares and 66,879,847 shares, at September 30, 2019 and December 31, 2018, respectively	7	7
Additional paid-in capital	218,761	208,317
Accumulated deficit	(213,116)	(198,422)
Accumulated other comprehensive loss	(12)	(14)
Total stockholders' equity	5,640	9,888
Total liabilities and stockholders' equity	$ 7,240	$ 11,751