Class of Warrant or Right, Number of Securities Expired

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of warrants outstanding and currently exercisable.

+ References

No definition available.

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- Definition

The weighted average grant-date fair value of warrantss granted during the reporting period.

+ References

No definition available.

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- 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.

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- Definition

Number of warrants or rights outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
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- Definition

Face amount or stated value per share of common stock.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
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- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- 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.

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No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

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Equity Instruments and Stock Based Compensation (Details Textual)	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015	Mar. 31, 2018 USD ($)	Mar. 12, 2018 shares	Feb. 23, 2018 shares	Feb. 12, 2018 USD ($)	Jan. 01, 2018 shares	Mar. 31, 2017 USD ($)	Dec. 30, 2016 € / shares	Mar. 12, 2012 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ordinary shares, shares authorized (in shares)	500,000,000	500,000,000	500,000,000
Ordinary shares, nominal value (in usd or euro per share) \| (per share)	$ 0.01	$ 0.01	$ 0.01								€ 0.122
Ordinary shares, shares issued (in shares)	42,720,000	41,463,000
Ordinary shares, shares outstanding (in shares)	37,313,000	39,346,000
Preferred shares, shares authorized (in shares)	50,000,000	50,000,000	50,000,000
Preferred shares, nominal value (in usd per share) \| $ / shares	$ 0.01	$ 0.01	$ 0.01
Preferred shares, shares outstanding (in shares)	0	0
Authorized repurchase amount \| $					$ 7,000,000			$ 18,000,000		$ 25,000,000
Stock repurchase program, remaining authorized repurchase amount \| $					$ 50,000,000
Share repurchases (in shares)	5,407,000
Share repurchases \| $	$ (49,998,000)	$ (22,361,000)
Unrecognized compensation expense \| $	$ 6,726,000
Weighted average period for unrecognized expense (in years)	2 years 4 months 6 days
Excess tax benefit related to stock-based compensation \| $	$ 0
Aggregate intrinsic value of options exercised \| $	$ 0	$ 1,161,000	$ 58,000
Grant date fair value of options granted (in usd per share) \| $ / shares	$ 3.60	$ 5.20	$ 6.14
Number of securities called by each warrant (in shares)	1
Grant date fair value of warrants granted (in usd per share) \| $ / shares			$ 2.99
Additional warrants outstanding									3,300,000
Warrant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for unrecognized expense (in years)	0 years	0 years	2 years 6 months
Vesting period (in years)	1 year
Expiration period (in years)	4 years
Aggregate intrinsic value of warrants exercised \| $	$ 0	$ 0	$ 0
Granted (in shares)	0	0
Free Share Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	2 years	3 years		4 years
Granted (in shares)	279,000		12.11
Weighted average grant fair value of free share awards \| $ / shares	$ 5.87	$ 8.95
Free Share Award \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period (in years)				2 years
Free Share Award \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service period (in years)				4 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years
Expiration period (in years)	10 years
Number of shares authorized (in shares)	1,873,147,000
2017 Avadel Employee Share Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ordinary shares, nominal value (in usd or euro per share) \| $ / shares	$ 0.01
Shares available for issuance under ESPP	1,000,000
Purchase price of common stock, percentage	85.00%
Stock issued during period, employee share purchase plans (in shares)	25,000
Eclat Pharmaceuticals
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities called by each warrant (in shares)							2,200,000					1,100
Remaining warrants outstanding expired						1,100,000
2/3 vesting at second anniversary of grant date \| Free Share Award, Grants during 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	67.00%
1/3 vesting at third anniversary of grant date \| Free Share Award, Grants during 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	33.00%
1/3 vesting at third anniversary of grant date \| Free Share Award, Grants beginning 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	33.00%
1/3 vesting at first anniversary of grant date \| Free Share Award, Grants beginning 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	33.00%
1/3 vesting at second anniversary of grant date \| Free Share Award, Grants beginning 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	33.00%