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Revenue Recognition (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Deferred Revenue Disclosure [Abstract]
Deferred revenue	$ 1,724	$ 2,007

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- Definition

Revenue, Remaining Performance Obligation, Amount

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_DeferredRevenueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration