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Inventory - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2026	Jun. 30, 2026	Feb. 12, 2026	Dec. 31, 2025
Inventory [Line Items]
Inventory		$ 298,957	$ 298,957		$ 196,625
Work in process		109,198	109,198		90,498
Finished goods	[1]	119,650	119,650		$ 37,740
Step-up Adjustment | Avadel Pharmaceuticals Plc
Inventory [Line Items]
Inventory				$ 121,600
Work in process				19,100
Finished goods				$ 102,500
Step-up Adjustment | Avadel Pharmaceuticals Plc | Cost of goods manufactured and sold
Inventory [Line Items]
Inventory amortization		$ 31,000	$ 43,700
[1] At June 30, 2026 and December 31, 2025, the Company had $50.7 million and $31.7 million, respectively, of finished goods inventory located at its third-party warehouse and shipping service provider.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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