Document and Entity Information - USD ($)		12 Months Ended
		Dec. 31, 2019	Mar. 16, 2020	Jun. 28, 2019
Document and Entity Information [Abstract]
Entity Registrant Name		SenesTech, Inc.
Entity Central Index Key		0001680378
Document Type		10-K
Amendment Flag		false
Document Period End Date		Dec. 31, 2019
Current Fiscal Year End Date		--12-31
Document Fiscal Period Focus		FY
Document Fiscal Year Focus		2019
Entity Well-known Seasoned Issuer		No
Entity Voluntary Filers		No
Entity Current Reporting Status		Yes
Entity Filer Category		Non-accelerated Filer
Entity Interactive Data Current		Yes
Entity Small Business		true
Entity Emerging Growth Company		true
Entity Ex Transition Period		true
Entity Shell Company		false
Entity Public Float				$ 42,516,643
Entity Common Stock, Shares Outstanding	[1]		1,819,981
Entity File Number		001-37941
Entity Incorporation, State or Country Code		DE

[1] Reflects a 1-for-20 reverse stock split of our outstanding common stock on February 4, 2020.