0001544227 tpst:SeriesAJuniorParticipatingPreferredPurchaseRightsMember 2026-08-13 2026-08-13 0001544227 2026-08-13 2026-08-13 0001544227 us-gaap:CommonStockMember 2026-08-13 2026-08-13 false 0001544227 8-K 2026-08-13 Tempest Therapeutics, Inc. DE 001-35890 45-1472564 2000 Sierra Point Parkway, Suite 400 Brisbane CA 94005 (415) 798-8589 false false false false Common Stock, $0.001 par value TPST NASDAQ Series A Junior Participating Preferred Purchase Rights true NASDAQ false