The amount represents the cash consideration received by the company for entering into royalty agreement.

No definition available.

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Namespace Prefix:	avdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Class Of Warrant Or Right, Term

+ References

No definition available.

+ Details

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- Definition

Class of Warrant or Right, Number of Securities Expired

+ References

No definition available.

+ Details

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Namespace Prefix:	avdl_
Data Type:	xbrli:sharesItemType
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Period Type:	instant

- Definition

This element represents the risk adjusted discount rate used for estimating fair value of cash flow.

+ References

No definition available.

+ Details

Name:	avdl_DiscountedCashFlowRiskAdjustedDiscountRate
Namespace Prefix:	avdl_
Data Type:	num:percentItemType
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- Definition

Final payments to acquire business gross.

+ References

No definition available.

+ Details

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Namespace Prefix:	avdl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage Of Earn Out Payments

+ References

No definition available.

+ Details

Name:	avdl_PercentageOfEarnOutPayments
Namespace Prefix:	avdl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	avdl_
Data Type:	num:percentItemType
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Period Type:	duration

- Definition

It represents the royalty amount for the period.

+ References

No definition available.

+ Details

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

- Definition

Royalty Guarantees, Commitments, Term

+ References

No definition available.

+ Details

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Namespace Prefix:	avdl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Period Type:	duration

- 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

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

The number of warrants issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
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Long-Term Related Party Payable (Details Textual) - USD ($)			1 Months Ended					12 Months Ended
	Feb. 05, 2016	Mar. 13, 2012	Jan. 31, 2021	Feb. 29, 2016	Dec. 31, 2013	Feb. 28, 2013	Mar. 31, 2012	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Mar. 12, 2018	Feb. 23, 2018	Mar. 12, 2012
Line of Credit Facility [Line Items]
Number of securities called by each warrant (in shares)								1
Percentage of royalty payable on net sales					0.834%
Cash consideration received on royalty agreement					$ 2,200,000
Payments to acquire businesses, gross								$ 22,951,000	$ 37,311,000	$ 30,838,000
Minimum
Line of Credit Facility [Line Items]
Discounted cash flow risk adjusted discount rate								15.00%
Affiliated Entity \| Deerfield CSF LLC
Line of Credit Facility [Line Items]
Percentage of royalty payable on net sales						1.75%
Cash consideration received on royalty agreement						$ 2,600,000
Eclat Pharmaceuticals
Line of Credit Facility [Line Items]
Warrants issued		2
Warrant term (in years)		6 years
Number of securities called by warrants (in shares)		3,300
Exercise price of warrants (in usd per share)		$ 11.00
Number of securities called by each warrant (in shares)												2,200,000	1,100
Percentage of earn-out payments							20.00%
Remaining warrants outstanding expired											1,100,000
Eclat Pharmaceuticals \| Exercise Price 1
Line of Credit Facility [Line Items]
Exercise price of warrants (in usd per share)		$ 7.44
Number of securities called by each warrant (in shares)												2,200	2,200
FSC \| Affiliated Entity \| Deerfield CSF LLC
Line of Credit Facility [Line Items]
Percentage of royalty payable on net sales	15.00%			15.00%
Royalty amount				$ 12,500,000
Payments to acquire businesses, gross	$ 1,050,000			$ 1,050,000
Debt instrument, term (in years)	5 years			5 years
FSC \| Affiliated Entity \| Deerfield CSF LLC \| Scenario, Forecast
Line of Credit Facility [Line Items]
Final payment to acquire business gross			$ 15,000,000
FSC \| Affiliated Entity \| Deerfield CSF LLC \| Maximum
Line of Credit Facility [Line Items]
Royalty guarantees, commitments, term (in years)	10 years			10 years