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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 3,968 $ 3,135
Accounts receivables 2 0
Investments available for sale 724 1,453
Prepaid expenses and other current assets 864 591
Total current assets 5,558 5,179
Prepaid expenses, non-current 1,796 1,989
Property and equipment, net 17 7
Total assets 7,371 7,175
Current liabilities:    
Accounts payable and accrued liabilities 2,966 414
Accrued payroll and related expenses 219 2,175
Income tax liability 399 393
Deferred revenue, current portion 0 1,500
Total current liabilities 3,584 4,482
Deferred revenue, non-current portion 0 1,000
Other liabilities 140 140
Total liabilities 3,724 5,622
Commitments and contingencies (Note 4)
Stockholders' equity:    
Preferred stock, par value $0.0001 per share Authorized: 10,000,000 shares at June 30, 2018 and December 31, 2017, Issued and outstanding: 0 shares at June 30, 2018 and December 31, 2017 0 0
Common stock, par value $0.0001 per share: Authorized: 100,000,000 shares at June 30, 2018 and December 31, 2017, Issued and outstanding: 62,292,808 shares and 59,051,978 shares, at June 30, 2018 and December 31, 2017, respectively 6 6
Additional paid-in capital 190,724 177,076
Accumulated deficit (187,070) (175,516)
Accumulated other comprehensive loss (13) (13)
Total stockholders' equity 3,647 1,553
Total liabilities and stockholders' equity $ 7,371 $ 7,175