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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Revenues:    
Revenues $ 481 $ 157,957
Operating expenses:    
Research and development 35,891 63,216
General and administrative 11,767 18,136
Impairment of long-lived assets 4,349 20,433
Impairment of goodwill 0 38,138
Total operating expenses 52,007 139,923
(Loss) income from operations (51,526) 18,034
Interest and other income, net 2,535 3,293
(Loss) income before income taxes (48,991) 21,327
Income tax expense 98 194
Net (loss) income $ (49,089) $ 21,133
Net (loss) income per share    
Basic (in dollars per share) $ (0.27) $ 0.13
Diluted (in dollars per share) $ (0.27) $ 0.12
Shares used in computing net (loss) income per share    
Basic (in shares) 180,342 168,533
Diluted (in shares) 180,342 169,181