Subsidiary Bankruptcy and Deconsolidation	3 Months Ended
Mar. 31, 2020
Reorganizations [Abstract]
Subsidiary Bankruptcy and Deconsolidation	Subsidiary Bankruptcy and Deconsolidation Bankruptcy Filing and Deconsolidation As a result of Specialty Pharma’s bankruptcy filing on February 6, 2019, Avadel has ceded authority for managing the business to the Bankruptcy Court, and Avadel management cannot carry on Specialty Pharma’s activities in the ordinary course of business without Bankruptcy Court approval. Avadel manages the day-to-day operations of Specialty Pharma but does not have discretion to make significant capital or operating budgetary changes or decisions and purchase or sell significant assets, as Specialty Pharma’s material decisions are subject to review by the Bankruptcy Court. For these reasons, we concluded that Avadel has lost control of Specialty Pharma, and no longer has significant influence over Specialty Pharma during the pendency of the bankruptcy. Therefore, we deconsolidated Specialty Pharma effective with the filing of the Chapter 11 bankruptcy in February 2019. In order to deconsolidate Specialty Pharma, the carrying values of the assets and certain liabilities of Specialty Pharma were removed from our unaudited condensed consolidated balance sheet as of February 5, 2019, and we recorded our investment in Specialty Pharma at its estimated fair value of $0. As the estimated fair value of our investment in Specialty Pharma was lower than its net book value immediately prior to the deconsolidation, we recorded a non-cash charge of approximately $2,673 for the three months ended March 31, 2019 associated with the deconsolidation of Specialty Pharma. Subsequent to the deconsolidation of Specialty Pharma, we are accounting for our investment in Specialty Pharma using the cost method of accounting because Avadel does not exercise significant influence over the operations of Specialty Pharma due to the Chapter 11 filing. On April 26, 2019, Specialty Pharma sold its intangible assets and remaining inventory to an unaffiliated third party in exchange for aggregate cash proceeds of approximately $250, pursuant to an order approving such sale which was issued by the Bankruptcy Court on April 15, 2019. As a result of such sale, Specialty Pharma has completed its divestment of the assets of the Noctiva business. On July 2, 2019, Specialty Pharma was made aware of a $50,695 claim made by the Internal Revenue Service (IRS) as part of the bankruptcy claims process against Specialty Pharma. On October 2, 2019 the IRS amended the original claim filed in July, reducing the claim to $9,302. Specialty Pharma files its U.S. federal tax return as a member of the Company’s consolidated U.S. tax group. As such, the IRS claim was filed against Specialty Pharma in the bankruptcy proceedings due to IRS tax law requirements for joint and several liability of all members in a consolidated U.S. tax group. Both Specialty Pharma and the Company disagreed with the merits of the amended IRS claim, and Specialty Pharma entered into negotiations regarding the treatment of the claim in the bankruptcy case. On November 19, 2019, Specialty Pharma and the IRS resolved their dispute, subject to Bankruptcy Court approval in Specialty Pharma's Chapter 11 plan, and without prejudice to the claims, rights and defenses of the IRS and other Avadel entities outside of the bankruptcy case. The resolution provided for allowance of the IRS claim as a priority claim but for the IRS to receive a distribution of not less than $125 from Specialty Pharma following confirmation of its chapter 11 plan, leaving a substantial amount of the bankruptcy estate for general unsecured creditors. Debtor in Possession (“DIP”) Financing – Related Party Relationship In connection with the bankruptcy filing, Specialty Pharma entered into a Debtor in Possession Credit and Security Agreement with Avadel US Holdings (“DIP Credit Agreement”) dated as of February 8, 2019, in an aggregate amount of up to $2,700, of which the funds are to be used by Specialty Pharma solely to fund operations through February 6, 2020. As of March 31, 2020, the Company had funded $407 under the DIP Credit Agreement. As the Company has assessed that it is unlikely that Specialty Pharma will pay back the loan to Avadel and the $407 has been recorded as part of the loss on deconsolidation of subsidiary within the unaudited condensed consolidated statements of loss for the three months ended March 31, 2019.

Subsidiary Bankruptcy and Deconsolidation

Bankruptcy Filing and Deconsolidation

As a result of Specialty Pharma’s bankruptcy filing on February 6, 2019, Avadel has ceded authority for managing the business to the Bankruptcy Court, and Avadel management cannot carry on Specialty Pharma’s activities in the ordinary course of business without Bankruptcy Court approval. Avadel manages the day-to-day operations of Specialty Pharma but does not have discretion to make significant capital or operating budgetary changes or decisions and purchase or sell significant assets, as Specialty Pharma’s material decisions are subject to review by the Bankruptcy Court. For these reasons, we concluded that Avadel has lost control of Specialty Pharma, and no longer has significant influence over Specialty Pharma during the pendency of the bankruptcy. Therefore, we deconsolidated Specialty Pharma effective with the filing of the Chapter 11 bankruptcy in February 2019.

In order to deconsolidate Specialty Pharma, the carrying values of the assets and certain liabilities of Specialty Pharma were removed from our unaudited condensed consolidated balance sheet as of February 5, 2019, and we recorded our investment in Specialty Pharma at its estimated fair value of $0. As the estimated fair value of our investment in Specialty Pharma was lower than its net book value immediately prior to the deconsolidation, we recorded a non-cash charge of approximately $2,673 for the three months ended March 31, 2019 associated with the deconsolidation of Specialty Pharma. Subsequent to the deconsolidation of Specialty Pharma, we are accounting for our investment in Specialty Pharma using the cost method of accounting because Avadel does not exercise significant influence over the operations of Specialty Pharma due to the Chapter 11 filing.

On April 26, 2019, Specialty Pharma sold its intangible assets and remaining inventory to an unaffiliated third party in exchange for aggregate cash proceeds of approximately $250, pursuant to an order approving such sale which was issued by the Bankruptcy Court on April 15, 2019. As a result of such sale, Specialty Pharma has completed its divestment of the assets of the Noctiva business.

On July 2, 2019, Specialty Pharma was made aware of a $50,695 claim made by the Internal Revenue Service (IRS) as part of the bankruptcy claims process against Specialty Pharma. On October 2, 2019 the IRS amended the original claim filed in July, reducing the claim to $9,302. Specialty Pharma files its U.S. federal tax return as a member of the Company’s consolidated U.S. tax group. As such, the IRS claim was filed against Specialty Pharma in the bankruptcy proceedings due to IRS tax law requirements for joint and several liability of all members in a consolidated U.S. tax group. Both Specialty Pharma and the Company disagreed with the merits of the amended IRS claim, and Specialty Pharma entered into negotiations regarding the treatment of the claim in the bankruptcy case. On November 19, 2019, Specialty Pharma and the IRS resolved their dispute, subject to Bankruptcy Court approval in Specialty Pharma's Chapter 11 plan, and without prejudice to the claims, rights and defenses of the IRS and other Avadel entities outside of the bankruptcy case. The resolution provided for allowance of the IRS claim as a priority claim but for the IRS to receive a distribution of not less than $125 from Specialty Pharma following confirmation of its chapter 11 plan, leaving a substantial amount of the bankruptcy estate for general unsecured creditors.

Debtor in Possession (“DIP”) Financing – Related Party Relationship

In connection with the bankruptcy filing, Specialty Pharma entered into a Debtor in Possession Credit and Security Agreement with Avadel US Holdings (“DIP Credit Agreement”) dated as of February 8, 2019, in an aggregate amount of up to $2,700, of which the funds are to be used by Specialty Pharma solely to fund operations through February 6, 2020. As of March 31, 2020, the Company had funded $407 under the DIP Credit Agreement. As the Company has assessed that it is unlikely that Specialty Pharma will pay back the loan to Avadel and the $407 has been recorded as part of the loss on deconsolidation of subsidiary within the unaudited condensed consolidated statements of loss for the three months ended March 31, 2019.