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Share-based Compensation - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	$ 31,139,000	$ 24,966,000	$ 67,469,000	$ 47,776,000
Selling, General and Administrative Expense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	20,988,000	16,977,000	47,097,000	32,114,000
R&D Expense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	8,219,000	$ 6,510,000	16,687,000	$ 12,401,000
Letter Agreement | Selling, General and Administrative Expense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	600,000		19,000,000
Letter Agreement | R&D Expense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	100,000		6,700,000
Avadel Pharmaceuticals Plc
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expense	0		18,400,000
Contingent CVR payment to former employees	400,000		2,200,000
Avadel Pharmaceuticals Plc | Letter Agreement
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Incremental share-based compensation expense related to certain equity awards	300,000		5,200,000
Inventory
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation cost capitalized	3,300,000		3,300,000		$ 3,200,000
Property, Plant and Equipment, Net
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share based compensation cost capitalized	$ 2,500,000		$ 2,500,000		$ 1,600,000

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- Definition

Contingent CVR payment.

+ References

No definition available.

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- Definition

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+ References

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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