Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue:
Collaboration revenue - related party	$ 0	$ 126,473	$ 0	$ 125,951
Type of Revenue [Extensible List]	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember	us-gaap:LicenseAndServiceMember
Total revenue	$ 0	$ 126,473	$ 0	$ 125,951
Operating expenses:
Research and development expenses	17,875	46,792	39,577	90,761
General and administrative expenses	16,059	28,051	31,525	50,521
Collaboration (profit) loss sharing - related party	(2,589)	2,106	(171)	5,713
Total operating expenses	31,345	76,949	70,931	146,995
(Loss) income from operations	(31,345)	49,524	(70,931)	(21,044)
Other income (expense):
Interest income	1,230	1,726	2,878	2,758
Interest expense	(3,447)	(3,187)	(8,110)	(5,135)
Other income (expense)	692	(1,511)	3,160	(1,201)
Total other expense, net	(1,525)	(2,972)	(2,072)	(3,578)
Net (loss) income	$ (32,870)	$ 46,552	$ (73,003)	$ (24,622)
Net (loss) income per share attributable to common stockholders, basic	$ (0.22)	$ 0.36	$ (0.49)	$ (0.19)
Net (loss) income per share attributable to common stockholders, diluted	$ (0.22)	$ 0.36	$ (0.49)	$ (0.19)
Weighted-average common shares outstanding, basic	151,514,597	127,713,486	148,808,089	126,793,342
Weighted average common shares outstanding, diluted	151,514,597	129,844,931	148,808,089	126,793,342
Other comprehensive (loss) income :
Unrealized (loss) income on investments, net of tax of $0	$ 0	$ (2)	$ 0	$ 10
Currency translation adjustment	0	(1)	0	1
Total other comprehensive (loss) income	0	(3)	0	11
Comprehensive loss (income)	$ (32,870)	$ 46,549	$ (73,003)	$ (24,611)