Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 23, 2023	Jun. 30, 2022
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-37977
Entity Registrant Name	AVADEL PHARMACEUTICALS PLC
Entity Incorporation, State or Country Code	L2
Entity Tax Identification Number	98-1341933
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
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 142,179,000
Entity Common Stock, Shares Outstanding		64,477,508
Documents Incorporated by Reference	Portions of either (a) a definitive proxy statement involving the election of directors or (b) an amendment to this Form 10-K, either of which will be filed within 120 days after December 31, 2022, are incorporated by reference into Part III of this Form 10-K.
Entity Central Index Key	0001012477
Amendment Flag	false
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
American Depositary Shares
Entity Information [Line Items]
Title of 12(b) Security	American Depositary Shares*
Trading Symbol	AVDL
Security Exchange Name	NASDAQ
Ordinary Share, Nominal Value $0.01 Per Share
Entity Information [Line Items]
Title of 12(b) Security	Ordinary Shares, nominal value $0.01 per share**
Trading Symbol	AVDL
Security Exchange Name	NASDAQ