Condensed Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Collaboration revenue	$ 3,543	$ 2,233
Operating expenses:
Research and development	66,832	47,765
General and administrative	13,898	12,064
Total operating expenses	80,730	59,829
Loss from operations	(77,187)	(57,596)
Other income (expense):
Interest income	8,433	5,516
Other expense	(101)	(314)
Total other income	8,332	5,202
Net loss	$ (68,855)	$ (52,394)
Net loss per share, basic (in dollars per share)	$ (0.79)	$ (0.74)
Net loss per share, diluted (in dollars per share)	$ (0.79)	$ (0.74)
Weighted-average shares outstanding, basic (in shares)	87,212	70,433
Weighted-average shares outstanding, diluted (in shares)	87,212	70,433
Other comprehensive income (loss):
Net unrealized gains (losses) on marketable securities	$ (589)	$ 1,169
Comprehensive loss	$ (69,444)	$ (51,225)