Contingent Liabilities and Commitments - Purchase Commitments (Details) - Inventories $ in Thousands	Dec. 31, 2019 USD ($)
Purchase Commitments:
2020	$ 1,434
2021	1,430
2022	1,430
2023	1,430
2024	0
Thereafter	0
Total	$ 5,724

Purchase Commitment, Maximum, Due in Next Twelve Months

No definition available.

Name:	avdl_PurchaseCommitmentMaximumDueinNextTwelveMonths
Namespace Prefix:	avdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant