CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total revenue	$ 12,684	$ 12,379	$ 24,339	$ 20,729
Operating expenses:
Research and development	31,096	24,612	58,071	45,418
General and administrative	12,695	10,569	24,448	19,902
Total operating expenses	43,791	35,181	82,519	65,320
Operating loss	(31,107)	(22,802)	(58,180)	(44,591)
Other (loss) income, net:
Interest (expense) income, net	316	(51)	422	(133)
Foreign exchange gains (loss)	24,607	(4,525)	32,337	7,678
Other (losses) gains , net	601	52	1,059	(385)
Total other income (loss), net	25,524	(4,524)	33,818	7,160
Net loss before income taxes	(5,583)	(27,326)	(24,362)	(37,431)
Income tax expense	131	62	245	111
Net loss	(5,714)	(27,388)	(24,607)	(37,542)
Other comprehensive loss:
Currency translation adjustment	(19,921)	3,475	(25,969)	(5,916)
Comprehensive loss	$ (25,635)	$ (23,913)	$ (50,576)	$ (43,458)
Net loss per share attributable to common stockholders:
Basic	$ (0.13)	$ (0.71)	$ (0.56)	$ (1.01)
Diluted	$ (0.13)	$ (0.71)	$ (0.56)	$ (1.01)
Weighted-average common shares outstanding:
Basic	43,636	38,376	43,781	37,299
Diluted	43,636	38,376	43,781	37,299
Collaboration Revenue [Member]
Total revenue from contracts with customers	$ 12,684	$ 5,118	$ 24,339	$ 6,717
Collaboration Revenue (Related Party) [Member]
Total revenue from contracts with customers	$ 0	$ 7,261	$ 0	$ 14,012