| Cover | May 13, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 13, 2021 |
| Entity File Number | 001-37941 |
| Entity Registrant Name | SenesTech, Inc. |
| Entity Central Index Key | 0001680378 |
| Entity Tax Identification Number | 20-2079805 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 23460 N |
| Entity Address, Address Line Two | 19th Avenue |
| Entity Address, Address Line Three | Suite 110 |
| Entity Address, City or Town | Phoenix |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85027 |
| City Area Code | (928) |
| Local Phone Number | 779-4143 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | SNES |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
