0001831868 2026-08-12 2026-08-12 0001831868 icu:CommonStockParValue00001PerShareCustomMember 2026-08-12 2026-08-12 0001831868 icu:WarrantsEachWholeWarrantExercisableForOneShareOfCommonStockFor1150PerShareCustomMember 2026-08-12 2026-08-12 false 0001831868 8-K 2026-08-12 SeaStar Medical Holding Corporation DE 001-39927 85-3681132 3513 Brighton Blvd Suite 410 Denver CO 80216 844 427-8100 false false false false Common Stock par value $0.0001 per share ICU NASDAQ Warrants, each whole warrant exercisable for one share of Common Stock for $11.50 per share ICUCW NASDAQ true false