CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Total revenues	$ 0	$ 283
Operating expenses:
Research and development	18,844	18,822
General and administrative	5,546	5,679
Total operating expenses	24,390	24,501
Loss from operations	(24,390)	(24,218)
Other income:
Interest income and other, net	2,521	2,846
Net loss	(21,869)	(21,372)
Other comprehensive (loss) income:
Unrealized (loss) gain on debt investments, net	(185)	106
Comprehensive loss	$ (22,054)	$ (21,266)
Per share information:
Net loss, basic (in dollars per share)	$ (0.25)	$ (0.24)
Net loss, diluted (in dollars per share)	$ (0.25)	$ (0.24)
Weighted-average shares outstanding, basic (in shares)	89,259,106	88,294,624
Weighted-average shares outstanding, diluted (in shares)	89,259,106	88,294,624
Contract and grant revenue
Total revenues	$ 0	$ 234
Licensing revenue
Total revenues	$ 0	$ 49