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Commitments and Contingencies (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Loss Contingencies [Line Items]
Percentage of royalty payable on net sales	15.00%
Guarantee, liability	$ 1,121
Guarantee from Armistice	1,117
Maximum
Loss Contingencies [Line Items]
Guarantee, liability	$ 10,300

X

- Definition

Guarantee Asset, Current Carrying Value

+ References

No definition available.

+ Details

Name:	avdl_GuaranteeAssetCurrentCarryingValue
Namespace Prefix:	avdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The percentage of royalty that has to be paid by the company as per the royalty agreement.

+ References

No definition available.

+ Details

Name:	avdl_PercentageOfRoyaltyPayableOnNetSales
Namespace Prefix:	avdl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: