Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue related party	$ 0	$ 0	$ 0	$ 24,990
Operating expenses:
Research and development	26,167	16,570	81,284	46,231
General and administrative	6,633	6,415	19,726	19,745
Goodwill impairment	19,462	0	19,462	0
Total operating expenses	52,262	22,985	120,472	65,976
Loss from operations	(52,262)	(22,985)	(120,472)	(40,986)
Interest income	2,520	1,224	7,800	1,581
Interest expense	(1)	(18)	(25)	(54)
Other expense, net	(142)	(217)	(472)	(456)
Loss before income tax provision	(49,885)	(21,996)	(113,169)	(39,915)
Income tax provision	0	0	0	0
Net loss	$ (49,885)	$ (21,996)	$ (113,169)	$ (39,915)
Net loss per share attributable to common stockholders, basic	$ (1.16)	$ (0.53)	$ (2.63)	$ (0.98)
Net loss per share attributable to common stockholders, diluted	$ (1.16)	$ (0.53)	$ (2.63)	$ (0.98)
Weighted-average common shares used in computing net income (loss) per share attributable to common stockholders, basic	42,980,641	41,642,815	43,001,901	40,547,792
Weighted-average common shares used in computing net income (loss) per share attributable to common stockholders, diluted	42,980,641	41,642,815	43,001,901	40,547,792