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CONDENSED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenues:        
License fees and royalties $ 165 $ 163 $ 691 $ 874
Operating expenses:        
Research and development 2,707 2,637 8,351 8,510
General and administrative 4,263 4,770 13,824 13,833
Total operating expenses 6,970 7,407 22,175 22,343
Loss from operations (6,805) (7,244) (21,484) (21,469)
Interest and other income 1,060 363 2,171 1,041
Change in fair value of equity investment 205   (270)  
Other expense (57) (18) (134) (59)
Net loss $ (5,597) $ (6,899) $ (19,717) $ (20,487)
Basic and diluted net loss per share $ (0.03) $ (0.04) $ (0.11) $ (0.13)
Shares used in computing basic and diluted net loss per share 184,301,986 159,216,642 173,187,753 159,186,853