Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 10, 2020	Jun. 28, 2019
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
Entity Common Stock, Shares Outstanding		46,404,432
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
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			$ 97,947,088