Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Mar. 12, 2024
Jun. 30, 2023
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag true    
Amendment Flag false    
Document Period End Date Dec. 31, 2023    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Documents Incorporated by Reference [Text Block] Part III incorporates by reference certain information from the registrant’s proxy statement (the “Proxy Statement”) for the 2024 Annual Meeting of Stockholders to be filed on or before April 29, 2024.    
Entity Information [Line Items]      
Entity Registrant Name ALTO INGREDIENTS, INC.    
Entity Central Index Key 0000778164    
Entity File Number 000-21467    
Entity Tax Identification Number 41-2170618    
Entity Incorporation, State or Country Code DE    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Public Float     $ 210.8
Entity Contact Personnel [Line Items]      
Entity Address, Address Line One 1300 South Second Street    
Entity Address, City or Town Pekin    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 61554    
Entity Phone Fax Numbers [Line Items]      
City Area Code (916)    
Local Phone Number 403-2123    
Entity Listings [Line Items]      
Title of 12(b) Security Common Stock, $0.001 par value    
Trading Symbol ALTO    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   75,697,150