CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 4,155	$ 7,611
Investments available for sale	2,772	1,803
Accounts receivables	8	6
Prepaid expenses and other current assets	454	718
Total current assets	7,389	10,138
Other assets	1,832	1,604
Property and equipment, net	5	9
Total assets	9,226	11,751
Current liabilities:
Accounts payable and accrued liabilities	448	1,050
Accrued payroll and related expenses	261	277
Other current liabilities	140	140
Income tax liability	0	396
Total current liabilities	849	1,863
Commitments and contingencies (Note 4)
Stockholders' equity:
Preferred stock, par value $0.0001 per share Authorized: 10,000,000 shares at June 30, 2019 and December 31, 2018, Issued and outstanding: 0 shares at June 30, 2019 and December 31, 2018	0	0
Common stock, par value $0.0001 per share Authorized: 100,000,000 shares at June 30, 2019 and December 31, 2018, Issued and outstanding: 68,754,547 shares and 66,879,847 shares, at June 30, 2019 and December 31, 2018, respectively	7	7
Additional paid-in capital	216,543	208,317
Accumulated deficit	(208,160)	(198,422)
Accumulated other comprehensive loss	(13)	(14)
Total stockholders' equity	8,377	9,888
Total liabilities and stockholders' equity	$ 9,226	$ 11,751