v3.26.3
Inventory - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2026
Feb. 12, 2026
Dec. 31, 2025
Inventory [Line Items]        
Inventory $ 261,098 $ 261,098   $ 196,625
Work in process 115,403 115,403   90,498
Finished goods [1] 79,207 79,207   $ 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 | Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold        
Inventory [Line Items]        
Inventory amortization $ 28,700 $ 72,400    
[1] At September 30, 2026 and December 31, 2025, the Company had $46.0 million and $31.7 million, respectively, of finished goods inventory located at its third-party warehouse and shipping service provider.