Significant Agreements (Details) - USD ($)			1 Months Ended	3 Months Ended		12 Months Ended
	Jan. 04, 2023	Mar. 25, 2021	Nov. 30, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Oct. 31, 2021	Sep. 30, 2021	Aug. 09, 2021
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Research and development				$ 58,032,000	$ 167,920,000
Affibody | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Aggregate milestone payments								$ 22,000,000	$ 3,000,000
Maximum aggregate milestone payments										$ 280,000,000
Payment due prior to milestone										$ 30,000,000
Aggregate milestone payments, period		10 years
Contingent payments, percentage										33.33%
Fair value threshold percentage										33.33%
Research and development			$ 15,000,000.0			$ 25,000,000
Probable milestone payments				0			$ 0
Pierre Fabre | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Aggregate milestone payments		$ 10,000,000
Aggregate milestone payments, period		10 years
Probable milestone payments				0
One-time payment		$ 31,000,000
One-time payment, period		30 days
Termination period		9 months
Pierre Fabre | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Development and Regulatory Milestone Payments
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Maximum aggregate milestone payments		$ 99,500,000
Pierre Fabre | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Commercial Sales Milestone Payments
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Maximum aggregate milestone payments		$ 390,000,000
Novelty Nobility | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Aggregate milestone payments, period	10 years
Probable milestone payments				$ 0
Contract termination, period	30 days
Novelty Nobility | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Development and Regulatory Milestone Payments
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Maximum aggregate milestone payments	$ 44,300,000
Novelty Nobility | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Commercial Sales Milestone Payments
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Maximum aggregate milestone payments	$ 682,000,000