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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Revenues:        
License fees and royalties $ 297,000 $ 109,000 $ 493,000 $ 353,000
Operating expenses:        
Research and development 24,603,000 18,527,000 67,308,000 61,577,000
General and administrative 15,642,000 7,256,000 29,784,000 21,793,000
Total operating expenses 40,245,000 25,783,000 97,092,000 83,370,000
Loss from operations (39,948,000) (25,674,000) (96,599,000) (83,017,000)
Interest income 852,000 112,000 1,294,000 421,000
Interest expense (1,817,000) (1,058,000) (4,877,000) (2,605,000)
Other income and (expense), net (138,000) (77,000) 916,000 1,106,000
Net loss $ (41,051,000) $ (26,697,000) $ (99,266,000) $ (84,095,000)
Basic net loss per share $ (0.10) $ (0.08) $ (0.26) $ (0.26)
Diluted net loss per share $ (0.10) $ (0.08) $ (0.26) $ (0.26)
Shares used in computing basic net loss per share 405,237,474 328,934,491 380,659,049 326,552,763
Shares used in computing diluted net loss per share 405,237,474 328,934,491 380,659,049 326,552,763