| Cover | Jan. 04, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 4, 2021 |
| Entity Registrant Name | Amyris, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-34885 |
| Entity Tax Identification Number | 55-0856151 |
| Entity Address, Address Line One | 5885 Hollis Street, Suite 100, |
| Entity Address, City or Town | Emeryville, |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94608 |
| City Area Code | (510) |
| Local Phone Number | 450-0761 |
| Entity Central Index Key | 0001365916 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | AMRS |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Document Information [Line Items] | |
| Entity Central Index Key | 0001365916 |
| Amendment Flag | false |
| Document Type | 8-K |
