Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 12, 2021
Document Information Line Items
Entity Registrant Name	SENESTECH, INC.
Trading Symbol	SNES
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		12,207,283
Amendment Flag	false
Entity Central Index Key	0001680378
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Shell Company	false
Entity Ex Transition Period	true
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-37941
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-2079805
Entity Address, Address Line One	23460 N
Entity Address, Address Line Two	19th Avenue, 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
Title of 12(b) Security	Common Stock, $0.001 par value
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes