v3.26.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 27, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Amendment Flag false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Documents Incorporated by Reference [Text Block] None    
Entity Information [Line Items]      
Entity Registrant Name SPACE ASSET ACQUISITION CORP.    
Entity Central Index Key 0002091222    
Entity File Number 001-43078    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or Country Code E9    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status No    
Entity Shell Company true    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Public Float     $ 0
Entity Contact Personnel [Line Items]      
Entity Address, Address Line One 174 Nassau Street,    
Entity Address, Address Line Two Suite 2100 Princeton,    
Entity Address, City or Town Princeton    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 08542    
Entity Phone Fax Numbers [Line Items]      
City Area Code (609)    
Local Phone Number 924-0759    
Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-third of one redeemable warrant      
Entity Listings [Line Items]      
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-third of one redeemable warrant    
Trading Symbol SAAQU    
Security Exchange Name NASDAQ    
Class A ordinary shares, par value $0.0001 per share      
Entity Listings [Line Items]      
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share    
Trading Symbol SAAQ    
Security Exchange Name NASDAQ    
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share      
Entity Listings [Line Items]      
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share    
Trading Symbol SAAQW    
Security Exchange Name NASDAQ    
Class A Ordinary Shares      
Entity Listings [Line Items]      
Entity Common Stock, Shares Outstanding   23,645,000  
Class B ordinary shares      
Entity Listings [Line Items]      
Entity Common Stock, Shares Outstanding   7,666,667