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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 9,990 $ 18,658
Investments available for sale 10,801 22,571
Prepaid expenses and other current assets 820 653
Total current assets 21,611 41,882
Prepaid expenses - non-current 2,855 3,144
Property and equipment, net 49 64
Total assets 24,515 45,090
Current liabilities:    
Accounts payable and accrued liabilities 1,378 3,554
Royalty payable 1,029 6,100
Related-party payable 0 81
Income tax liability 400 408
Deferred revenue, current portion 1,500 1,500
Derivative liability 0 320
Total current liabilities 4,307 11,963
Deferred revenue, non-current portion 1,875 500
Total liabilities $ 6,182 $ 12,463
Commitments and contingencies
Stockholders' equity:    
Preferred stock, par value $0.0001 per share Authorized: 10,000,000 shares at September 30, 2015 and December 31, 2014, Issued and outstanding: 0 shares at September 30, 2015 and December 31, 2014 $ 0 $ 0
Common stock, par value $0.0001 per share Authorized: 100,000,000 shares at September 30, 2015 and December 31, 2014, Issued and outstanding: 52,547,257 shares and 51,996,701 shares, at September 30, 2015 and December 31, 2014, respectively 5 5
Additional paid-in capital 140,271 133,072
Accumulated deficit (121,933) (100,435)
Accumulated other comprehensive loss (10) (15)
Total stockholders' equity 18,333 32,627
Total liabilities and stockholders' equity $ 24,515 $ 45,090