Condensed Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Collaboration revenue	$ 2,233	$ 1,795
Operating expenses:
Research and development	47,765	27,688
General and administrative	12,064	8,567
Total operating expenses	59,829	36,255
Loss from operations	(57,596)	(34,460)
Other income (expense):
Interest income	5,516	250
Other expense	(314)	(25)
Total other income	5,202	225
Net loss	(52,394)	(34,235)
Other comprehensive loss:
Net unrealized (losses) gains on marketable securities	1,169	(1,839)
Comprehensive loss	$ (51,225)	$ (36,074)
Net loss per share, basic (in dollars per share)	$ (0.74)	$ (0.71)
Net loss per share, diluted (in dollars per share)	$ (0.74)	$ (0.71)
Weighted-average shares outstanding, basic (in shares)	70,433	48,246
Weighted-average shares outstanding, diluted (in shares)	70,433	48,246