Warrants - Schedule of Weighted-Average Strike Price and Time to Maturity for Each Warrant Tranche (Details) - $ / shares	Jun. 30, 2024	Jun. 07, 2024	Dec. 31, 2023
Class of Warrant or Right [Line Items]
Warrant Share Equivalents		16,788,000,000
Weighted-Average Strike Price	$ 22.83	$ 11.5
Liability Classified Warrants [Member] | Investor D Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant Share Equivalents			254,732
Weighted-Average Strike Price			$ 12.5
Weighted-Average Time to Expiration			4 years 7 months 24 days
Liability Classified Warrants [Member] | Private Placement Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant Share Equivalents	229,520		229,520
Weighted-Average Strike Price	$ 287.5		$ 287.5
Weighted-Average Time to Expiration	3 years 3 months 25 days		3 years 9 months 25 days
Liability Classified Warrants [Member] | PIPE Investor Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant Share Equivalents	20,000		20,000
Weighted-Average Strike Price	$ 287.5		$ 287.5
Weighted-Average Time to Expiration	3 years 3 months 25 days		3 years 9 months 25 days
Equity Classified Warrants [Member] | Investor E Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant Share Equivalents	650,446
Weighted-Average Strike Price	$ 20.76
Weighted-Average Time to Expiration	4 years 11 months 4 days
Equity Classified Warrants [Member] | Placement Agent warrants [Member]
Class of Warrant or Right [Line Items]
Warrant Share Equivalents	21,682
Weighted-Average Strike Price	$ 22.75
Weighted-Average Time to Expiration	4 years 6 months 29 days
Equity Classified Warrants [Member] | Public Stockholders Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant Share Equivalents	422,000		422,000
Weighted-Average Strike Price	$ 287.5		$ 287.5
Weighted-Average Time to Expiration	3 years 3 months 29 days		3 years 9 months 25 days
Equity Classified Warrants [Member] | Legacy SeaStar Inc. Warrants [Member]
Class of Warrant or Right [Line Items]
Warrant Share Equivalents	1,957		1,957
Weighted-Average Strike Price	$ 250		$ 250
Weighted-Average Time to Expiration	1 year 10 months 17 days		2 years 4 months 17 days