Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 13, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	Avadel Pharmaceuticals PLC
Entity Central Index Key	0001012477
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	AVDL
Entity Common Stock, Shares Outstanding		37,355,511
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Smaller Reporting Company	false
Entity Shell Company	false
Entity Public Float			$ 221,263,931