Cover page - shares	9 Months Ended
	Sep. 30, 2022	Nov. 07, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
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, Postal Zip Code	D02 T380
Entity Address, Country	IE
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**
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Smaller Reporting Company	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		61,778,732
Entity Central Index Key	0001012477
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
No Trading Symbol	true
NASDAQ/NMS (GLOBAL MARKET)
Entity Information [Line Items]
Title of 12(b) Security	American Depositary Shares*
Trading Symbol	AVDL
Security Exchange Name	NASDAQ