Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Collaboration Revenue	$ 23,194	$ 4,695	$ 108,123	$ 5,759
Operating expenses:
Research and development	30,653	28,055	62,843	55,081
General and administrative	8,095	9,282	16,798	18,267
Total operating expenses	38,748	37,337	79,641	73,348
(Loss) income from operations	(15,554)	(32,642)	28,482	(67,589)
Other income:
Interest income	3,068	2,637	6,507	5,079
Foreign currency exchange gain (loss), net	1,390	(53)	1,563	567
Gain on disposal of property and equipment	0	0	59	0
Total other income	4,458	2,584	8,129	5,646
Net (loss) income before income taxes	(11,096)	(30,058)	36,611	(61,943)
Provision for income taxes	(1,199)	(252)	(2,021)	(335)
Net (loss) income	(12,295)	(30,310)	34,590	(62,278)
Comprehensive (loss) income:
Provision for pension benefit obligation	53	35	101	70
Unrealized loss on available-for-sale securities	(97)	(12)	(118)	(16)
Comprehensive (loss) income	$ (12,339)	$ (30,287)	$ 34,573	$ (62,224)
(Loss) earnings per share:
Basic	$ (0.15)	$ (0.43)	$ 0.42	$ (0.95)
Diluted	$ (0.15)	$ (0.43)	$ 0.42	$ (0.95)
Weighted average number of shares outstanding:
Basic	82,186,768	71,233,992	82,167,849	65,695,095
Diluted	82,186,768	71,233,992	82,890,063	65,695,095