Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Apr. 24, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K/A
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2023
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Current Fiscal Year End Date	--12-31
Entity File Number	001-37977
Entity Registrant Name	AVADEL PHARMACEUTICALS PLC
Entity Central Index Key	0001012477
Entity Tax Identification Number	98-1341933
Entity Incorporation, State or Country Code	L2
Entity Address, Address Line One	10 Earlsfort Terrace
Entity Address, City or Town	Dublin 2
Entity Address, Country	IE
Entity Address, Postal Zip Code	D02 T380
Country Region	353
City Area Code	1
Local Phone Number	901-5201
Title of 12(b) Security	Ordinary Shares, nominal value $0.01 per share
Trading Symbol	AVDL
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 1,459,121,731
Entity Common Stock, Shares Outstanding		96,116,323
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Auditor Name	Deloitte and Touche LLP
Auditor Location	St. Louis, Missouri
Auditor Firm ID	34