CONDENSED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
License fees and royalties	$ 109	$ 108	$ 353	$ 203
Operating expenses:
Research and development	18,527	13,613	61,577	35,260
General and administrative	7,256	6,510	21,793	18,590
Total operating expenses	25,783	20,123	83,370	53,850
Loss from operations	(25,674)	(20,015)	(83,017)	(53,647)
Interest income	112	322	421	1,551
Interest expense	(1,058)	(6)	(2,605)	(6)
Change in fair value of equity investment		(118)		109
Other income and (expense), net	(77)	166	1,106	163
Net loss	$ (26,697)	$ (19,651)	$ (84,095)	$ (51,830)
Basic and diluted net loss per share	$ (0.08)	$ (0.06)	$ (0.26)	$ (0.20)
Shares used in computing basic and diluted net loss per share	328,934,491	318,799,174	326,552,763	255,560,779