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Cover
Aug. 26, 2021
Cover [Abstract]  
Entity Registrant Name Aemetis, Inc.
Entity Central Index Key 0000738214
Document Type 8-K
Amendment Flag false
Entity Emerging Growth Company false
Document Period End Date Aug. 26, 2021
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Incorporation State Country Code NV
Entity File Number 001-36475
Entity Tax Identification Number 26-1407544
Entity Address Address Line 1 20400 Stevens Creek Blvd
Entity Address Address Line 2 Suite 700
Entity Address City Or Town Cupertino
Entity Address State Or Province CA
Entity Address Postal Zip Code 95014
City Area Code 408
Local Phone Number 213-0940
Security 12b Title Common Stock, par value $0.001
Trading Symbol AMTX
Security Exchange Name NASDAQ