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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Avadel Finance Cayman Limited, a Cayman Islands exempted company and an indirect wholly-owned subsidiary of Avadel Pharmaceuticals plc, repaid, with cash on hand, the remaining $17,500 aggregate principal amount of its February 2023 Notes on the maturity date of February 1, 2023. On March 29, 2023, the Issuer executed an agreement to exchange $96,188 of its $117,375 October 2023 Notes for a new series of 6.0% exchangeable notes due April 2027 (the “April 2027 Notes”) (the “2023 Exchange Transaction”). The remaining $21,187 aggregate principal amount of the October 2023 Notes will maintain a maturity date of October 2, 2023. On March 29, 2023, the Company executed a royalty purchase agreement with RTW Investments, L.P. that could provide the Company up to $75,000 of royalty financing. The $75,000 of royalty financing will be accessible following achievement of certain regulatory and financial milestones, including final FDA approval and commercial launch of LUMRYZ.