Contingent Liabilities and Commitments - Purchase Commitments (Details) - Inventories $ in Thousands	Dec. 31, 2018 USD ($)
Purchase Commitments:
2019	$ 10,754
2020	5,948
2021	4,880
2022	4,880
2023	220
Thereafter	0
Total	$ 26,682

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