CONDENSED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
License fees and royalties	$ 137	$ 52
Operating expenses:
Research and development	21,113	10,802
General and administrative	7,478	6,120
Total operating expenses	28,591	16,922
Loss from operations	(28,454)	(16,870)
Interest income	173	754
Interest expense	(743)
Change in fair value of equity investment		(195)
Other income and (expense), net	1,200	(44)
Net loss	$ (27,824)	$ (16,355)
Basic and diluted net loss per share	$ (0.09)	$ (0.08)
Shares used in computing basic and diluted net loss per share	323,638,696	200,222,092