Restructuring, Impairment and Costs of Terminated Program - Summary of Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring and Related Activities [Abstract]
Clinical trial expense, other third-party and employee costs for the wind down of the bempegaldesleukin program	$ 0	$ 1,356	$ 0	$ 2,954
Severance and benefit expense	0	1,943	0	7,426
Impairment of other property, plant and equipment	8,329	13,255	8,329	26,455
Contract termination and other restructuring costs	4,960	0	5,935	912
Restructuring, impairment and other costs of terminated program	$ 13,289	$ 16,554	$ 14,264	$ 37,747

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

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-Name Accounting Standards Codification
-Section 45
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
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-Paragraph 100
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-Topic 360
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- Definition

The loss recognized on termination of a contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 912
-SubTopic 275
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479072/912-275-50-4

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- References

No definition available.

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

+ References

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

+ Details

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