CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue:
Total revenue	$ 49,859	$ 10,519	$ 87,871	$ 90,804
Operating expenses:
Research and development, net	58,669	52,668	112,242	104,436
General and administrative	12,316	13,225	27,167	26,987
Total operating expenses	70,985	65,893	139,409	131,423
Loss from operations	(21,126)	(55,374)	(51,538)	(40,619)
(Loss) gain from foreign currency	(388)	149	(441)	(179)
Gain on debt extinguishment				33,953
Finance income, net	4,148	3,252	8,164	5,729
Net loss before income taxes	(17,366)	(51,973)	(43,815)	(1,116)
Provision for income taxes	(150)	577	218	680
Net loss	$ (17,216)	$ (52,550)	$ (44,033)	$ (1,796)
Net loss per share:
Basic	$ (0.64)	$ (1.98)	$ (1.64)	$ (0.07)
Diluted	$ (0.64)	$ (1.98)	$ (1.64)	$ (0.07)
Weighted-average shares outstanding:
Basic	26,967	26,563	26,923	26,557
Diluted	26,967	26,563	26,923	26,557
Comprehensive loss:
Net loss	$ (17,216)	$ (52,550)	$ (44,033)	$ (1,796)
Comprehensive loss	(17,216)	(52,550)	(44,033)	(1,796)
Collaboration Revenue [Member]
Revenue:
Total revenue	45,976	9,565	78,574	89,294
Grant Revenue [Member]
Revenue:
Total revenue	$ 3,883	$ 954	$ 9,297	$ 1,510