Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Topic 730
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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Name:	us-gaap_ResearchAndDevelopmentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

In-Licensing Arrangement (Detail) - USD ($)	3 Months Ended		6 Months Ended
In-Licensing Arrangement (Detail) - USD ($)	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2023
In-Licensing arrangement [Line Items]
Research and development	$ 38,780,000	$ 40,791,000	$ 73,754,000	$ 80,489,000
Contractual Obligation	10,400,000		10,400,000
Synaffix B.V.
In-Licensing arrangement [Line Items]
Potential development and regulatory milestone payments under agreement					$ 2,800,000,000
Research and development	$ 0	$ 1,200,000	$ 300,000	$ 2,400,000