v3.25.1
Cover - shares
 3 Months Ended
Mar. 31, 2025
May 08, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
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  
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   3,682,428
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Entity Central Index Key 0001544227  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, $0.001 par value  
Trading Symbol TPST  
Security Exchange Name NASDAQ  
Series A Junior Participating Preferred Purchase Rights    
Document Information [Line Items]    
Title of 12(b) Security Series A Junior Participating Preferred Purchase Rights  
No Trading Symbol Flag true  
Security Exchange Name NASDAQ