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Revenue - Incyte Corporation (Details) $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended			24 Months Ended	87 Months Ended
	Aug. 31, 2024 USD ($)	Oct. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2019 performanceObligation
Collaboration and Other Agreements [Line Items]
Revenues				$ 149,962	$ 58,749	$ 151,941
Incyte MGA012 Agreement | Incyte Corporation (Incyte)
Collaboration and Other Agreements [Line Items]
Non-refundable upfront payment			$ 150,000
Amounts recognized								$ 215,000
Number of performance obligations | performanceObligation									2
Transaction price		$ 154,000
Clinical trial activities selling price amount							$ 4,000
Minimum | Incyte MGA012 Agreement | Incyte Corporation (Incyte)
Collaboration and Other Agreements [Line Items]
Potential proceeds from royalties percent		15.00%
Maximum | Incyte MGA012 Agreement | Incyte Corporation (Incyte)
Collaboration and Other Agreements [Line Items]
Potential development and regulatory milestone payments		$ 210,000
Potential commercial milestone payments		$ 330,000
Potential proceeds from royalties percent		24.00%
Revenues From License Agreements | Incyte MGA012 Agreement | Incyte Corporation (Incyte)
Collaboration and Other Agreements [Line Items]
Revenues	$ 100,000	$ 150,000		100,600	15,000	30,000
Revenues From License Agreements | Incyte MGA012 Supply Agreement | Incyte Corporation (Incyte)
Collaboration and Other Agreements [Line Items]
Revenues				200	1,900	700
Revenues From License Agreements | Incyte MGA012 Clinical Services | Incyte Corporation (Incyte)
Collaboration and Other Agreements [Line Items]
Revenues				$ 1,800	$ 4,200	$ 300

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