Cover - shares	3 Months Ended
	Mar. 31, 2023	May 04, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	001-35890
Entity Registrant Name	Tempest Therapeutics, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-1472564
Entity Address, Address Line One	2000 Sierra Point Parkway
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Brisbane
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94005
City Area Code	(415)
Local Phone Number	798-8589
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	TPST
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		11,586,406
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2023
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001544227
Security Exchange Name	NASDAQ