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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Current assets:        
Cash and cash equivalents $ 5,544 $ 3,135 $ 3,609 $ 6,627
Investments available for sale 583 1,453    
Prepaid expenses and other current assets 870 591    
Accounts receivables 6 0    
Total current assets 7,003 5,179    
Prepaid expenses, non-current 1,907 1,989    
Property and equipment, net 1 7    
Total assets 8,911 7,175    
Current liabilities:        
Accounts payable and accrued liabilities 3,745 414    
Related party payable 258 0    
Accrued payroll and related expenses 201 2,175    
Income tax liability 398 393    
Deferred revenue, current portion 2 1,500    
Total current liabilities 4,604 4,482    
Deferred revenue, non-current portion 0 1,000    
Other liabilities 140 140    
Total liabilities 4,744 5,622    
Commitments and contingencies (Note 5)    
Stockholders' equity:        
Preferred stock, par value $0.0001 per share Authorized: 10,000,000 shares at March 31, 2018 and December 31, 2017, Issued and outstanding: 0 shares at March 31, 2018 and December 31, 2017 0 0    
Common stock, par value $0.0001 per share Authorized: 100,000,000 shares at March 31, 2018 and December 31, 2017, Issued and outstanding: 60,823,667 shares and 59,051,978 shares, at March 31, 2018 and December 31, 2017, respectively 6 6    
Additional paid-in capital 184,793 177,076    
Accumulated deficit (180,620) (175,516)    
Accumulated other comprehensive loss (12) (13)    
Total stockholders' equity 4,167 1,553    
Total liabilities and stockholders' equity $ 8,911 $ 7,175