CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Total revenues	$ 129	$ 26	$ 129	$ 309
Operating expenses:
Research and development	18,428	16,926	37,272	35,748
General and administrative	4,533	4,448	10,079	10,127
Total operating expenses	22,961	21,374	47,351	45,875
Loss from operations	(22,832)	(21,348)	(47,222)	(45,566)
Other income:
Interest income and other, net	2,147	2,772	4,668	5,618
Net loss	(20,685)	(18,576)	(42,554)	(39,948)
Other comprehensive loss:
Unrealized loss on debt investments, net	(30)	(582)	(215)	(476)
Comprehensive loss	$ (20,715)	$ (19,158)	$ (42,769)	$ (40,424)
Per share information:
Net loss, basic (in dollars per share)	$ (0.23)	$ (0.21)	$ (0.48)	$ (0.45)
Net loss, diluted (in dollars per share)	$ (0.23)	$ (0.21)	$ (0.48)	$ (0.45)
Weighted-average shares outstanding, basic (in shares)	89,630,959	88,583,567	89,445,033	88,439,894
Weighted-average shares outstanding, diluted (in shares)	89,630,959	88,583,567	89,445,033	88,439,894
Contract and grant revenue
Total revenues	$ 129	$ 26	$ 129	$ 260
Licensing revenue
Total revenues	$ 0	$ 0	$ 0	$ 49