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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Mar. 24, 2025
Jun. 28, 2024
Document Information [Line Items]      
Document Type 10-K/A    
Amendment Flag true    
Amendment Description EXPLANATORY NOTE This Amendment No. 1 on Form 10-K/A (“Form 10-K/A”) amends and restates certain items in Allurion Technologies, Inc.'s (the “Company”) Annual Report on Form 10-K for the fiscal year ended December 31, 2024, initially filed with the Securities and Exchange Commission (the "SEC") on March 27, 2025 (the "Original Form 10-K").In this Form 10-K/A, the Company is restating its previously issued audited consolidated financial statements as of and for the fiscal year ended December 31, 2024 as further described below.  In addition, the Company is filing amendments to (i) its Annual Report on Form 10-K for the fiscal year ended December 31, 2023, as amended (together with the Original Form 10-K, the “Annual Reports”), to restate its previously issued audited consolidated financial statements as of and for the fiscal year ended December 31, 2023 and (ii) its Quarterly Reports on Form 10-Q for the quarters ended March 31, 2024, June 30, 2024, September 30, 2024 and March 31, 2025 (the “Quarterly Reports”) to restate its previously issued unaudited condensed consolidated financial statements for the fiscal quarters ended March 31, 2024, June 30, 2024, September 30, 2024 and March 31, 2025.The Company does not intend to amend any other reports previously filed with the SEC. Accordingly, investors and other readers should rely only on the financial information and related disclosures regarding the periods described above (the “Affected Periods”) in this Form 10-K/A, such amendments to the Annual Reports and Quarterly Reports described in the preceding paragraph, and in any other future filings with the SEC (as applicable) and should not rely on the prior reports of its independent registered public accounting firm on the consolidated financial statements as of and for the years ended December 31, 2023 and 2024, as applicable, or any previously furnished or filed reports, press releases, investor presentations or similar communications relating to the Affected Periods.    
Document Period End Date Dec. 31, 2024    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Registrant Name Allurion Technologies, Inc.    
Entity Central Index Key 0001964979    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Current Fiscal Year End Date --12-31    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] true    
Document Financial Statement Restatement Recovery Analysis [Flag] false    
Entity Shell Company false    
Entity Incorporation, State or Country Code DE    
Entity File Number 001-41767    
Entity Tax Identification Number 92-2182207    
Entity Address, Address Line One 11 Huron Drive    
Entity Address, City or Town Natick    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 01760    
City Area Code 508    
Local Phone Number 647-4000    
Entity Public Float     $ 109,264,683
Entity Common Stock, Shares Outstanding   5,963,549  
Document Annual Report true    
Document Transition Report false    
Auditor Firm ID 34    
Auditor Name Deloitte & Touche LLP    
Auditor Location Boston, Massachusetts    
Auditor Opinion

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Allurion Technologies, Inc. and subsidiaries (the "Company") as of December 31, 2024 and 2023, the related consolidated statements of operations, comprehensive loss, stockholders’ deficit, and cash flows, for each of the two years in the period ended December 31, 2024, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the two years in the period ended December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.

Restatement of the 2024 Financial Statements

As discussed in Note 2 to the financial statements, the accompanying financial statements have been restated to correct for misstatements.

    
Common Stock, par value $0.0001 per share      
Document Information [Line Items]      
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol ALUR    
Security Exchange Name NYSE    
Warrants to purchase 0.056818 shares of Common Stock for $202.50 per share      
Document Information [Line Items]      
Title of 12(b) Security Warrants to purchase 0.056818 shares of Common Stock for $202.50 per share    
Trading Symbol ALUR WS    
Security Exchange Name NYSE