Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Consolidated Statements of Operations and Comprehensive Loss
Collaboration revenues	$ 11,397	$ 4,378	$ 16,293	$ 8,238
Operating expenses:
Research and development	39,720	19,854	71,931	34,138
General and administrative	14,788	11,824	29,276	28,783
Total operating expenses	54,508	31,678	101,207	62,921
Loss from operations	(43,111)	(27,300)	(84,914)	(54,683)
Other income (expense):
Interest income	812	908	3,741	1,126
Interest expense	(821)	(883)	(1,629)	(1,701)
Total other income (expense), net	(9)	25	2,112	(575)
Net loss before income tax provision	(43,120)	(27,275)	(82,802)	(55,258)
Benefit from income taxes	(517)	(447)	(1,135)	(866)
Net loss	$ (42,603)	$ (26,828)	$ (81,667)	$ (54,392)
Net loss per share, basic	$ (1.41)	$ (0.90)	$ (2.71)	$ (1.84)
Net loss per share, diluted	$ (1.41)	$ (0.90)	$ (2.71)	$ (1.84)
Weighted average ordinary shares outstanding, basic	30,191,693	29,648,564	30,097,234	29,626,974
Weighted average ordinary shares outstanding, diluted	30,191,693	29,648,564	30,097,234	29,626,974
Comprehensives loss:
Net loss	$ (42,603)	$ (26,828)	$ (81,667)	$ (54,392)
Other comprehensive income (loss):
Foreign currency translation adjustment	(948)	2,094	(1,264)	3,014
Total comprehensive loss	$ (43,551)	$ (24,734)	$ (82,931)	$ (51,378)