Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue:
License and collaboration revenue	$ 12,595	$ 267,630	$ 344,775
Total revenue	12,595	267,630	344,775
Operating expenses:
Research and development expenses	113,300	97,359	59,369
General and administrative expenses	50,396	43,947	40,505
Total operating expenses	163,696	141,306	99,874
(Loss) income from operations	(151,101)	126,324	244,901
Other income:
Grant income	2,687	2,091	10,181
Research and development tax credits	3,527	1,172	0
Interest income	31,774	11,361	78
Other income, net	4,083	7,788	1,304
(Loss) income before income tax expense	(109,030)	148,736	256,464
Income tax expense	3,612	52,084	41,943
Net (loss) income	(112,642)	96,652	214,521
Net (loss) income attributable to common stockholders	$ (112,642)	$ 96,652	$ 214,521
Basic net (loss) income per common share	$ (3.15)	$ 2.72	$ 6.1
Diluted net (loss) income per common share	$ (3.15)	$ 2.56	$ 5.68
Weighted-average common shares outstanding - basic	35,763,520	35,552,025	35,181,383
Weighted-average common shares outstanding - diluted	35,763,520	37,766,507	37,774,790
Net Income (Loss)	$ (112,642)	$ 96,652	$ 214,521
Foreign currency translation adjustments	(3,631)	(8,478)	(1,635)
Unrealized gain (loss) related to available-for-sale debt securities	35	(148)	0
Comprehensive (loss) income	$ (116,238)	$ 88,026	$ 212,886