v3.26.1
Cover - shares
 6 Months Ended
Jun. 30, 2026
Aug. 14, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Amendment Flag false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Entity Registrant Name XSOLLA SPAC 1  
Entity Central Index Key 0002088807  
Entity File Number 001-43066  
Entity Tax Identification Number 00-0000000  
Entity Incorporation, State or Country Code E9  
Current Fiscal Year End Date --12-31  
Entity Address, Address Line One 15260 Ventura Boulevard  
Entity Address, Address Line Two Suite 2230  
Entity Address, City or Town Sherman Oaks  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 91403  
City Area Code (877)  
Local Phone Number 987-9233  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company true  
Units, Each Consisting of One Class A Ordinary Share, Par Value $0.0001 Per Share, and One-Half of One Redeemable Warrant    
Document Information [Line Items]    
Title of 12(b) Security Units, each consisting of one Class A ordinary share, par value $0.0001 per share, and one-half of one redeemable warrant  
Trading Symbol XSLLU  
Security Exchange Name NASDAQ  
Class A Ordinary Shares, Par Value $0.0001 Per Share    
Document Information [Line Items]    
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share  
Trading Symbol XSLL  
Security Exchange Name NASDAQ  
Warrants, Each Whole Warrant Exercisable for One Class A Ordinary Share at an Exercise Price Of $11.50 Per Share    
Document Information [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 XSLLW  
Security Exchange Name NASDAQ  
Class A Ordinary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   20,873,579
Class B Ordinary Shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   6,806,462