Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenues	$ 0	$ 0	$ 0
Operating expenses:
Research and development	63,806	54,234	44,981
General and administrative	37,021	16,121	10,701
Total operating expenses	100,827	70,355	55,682
Loss from operations	(100,827)	(70,355)	(55,682)
Other income (expense):
Amortization of financing costs	(88)	(59)	(18)
Interest income, net	15,020	1,589	703
Realized loss on investments, net	0	(42)	0
Foreign exchange gain	0	0	7
Total other income, net	14,932	1,488	692
Net loss	(85,895)	(68,867)	(54,990)
Other comprehensive loss, net of tax:
Unrealized gain (loss) on securities	742	(295)	(495)
Foreign currency translation loss	29	258	0
Comprehensive loss	$ (85,182)	$ (69,420)	$ (55,485)
Basic net loss per common share	$ (0.91)	$ (0.90)	$ (0.71)
Weighted-average shares used to compute basic net loss per share	94,346,991	76,833,630	77,197,680
Diluted net loss per common share	$ (0.91)	$ (0.90)	$ (0.71)
Weighted-average shares used to compute diluted net loss per share	94,346,991	76,833,630	77,197,680