Quarterly report pursuant to Section 13 or 15(d)

Cover Page

v3.22.2.2
Cover Page - shares
9 Months Ended
Sep. 30, 2022
Nov. 11, 2022
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Entity Registrant Name SEASTAR MEDICAL HOLDING CORPORATION  
Entity Central Index Key 0001831868  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2022  
Document Fiscal Year Focus 2022  
Entity File Number 001-39927  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 85-3681132  
Entity Address, Address Line One 3513 Brighton Blvd,  
Entity Address, Address Line Two Suite 410  
Entity Address, City or Town Denver  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80216  
City Area Code 844  
Local Phone Number 427-8100  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Shell Company true  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   12,699,668
Common Stock [Member]    
Document Information [Line Items]    
Title of 12(b) Security Common Stock par value $0.0001 per share  
Trading Symbol ICU  
Security Exchange Name NASDAQ  
Redeemable Warrants [Member]    
Document Information [Line Items]    
Title of 12(b) Security Warrants, each warrant exercisable for one share of Common Stock at an exercise price of $11.50  
Trading Symbol ICUW  
Security Exchange Name NASDAQ