0001544227 2026-01-27 2026-01-27 0001544227 us-gaap:CommonStockMember 2026-01-27 2026-01-27 0001544227 us-gaap:SeriesAPreferredStockMember 2026-01-27 2026-01-27 false 0001544227 8-K 2026-01-27 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, par value $0.001 per share TPST NASDAQ Series A Junior Participating Preferred Purchase Rights NASDAQ false