v3.26.3
Cover - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2026
Sep. 25, 2026
Sep. 02, 2026
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Jun. 30, 2026    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2026    
Current Fiscal Year End Date --06-30    
Entity File Number 001-43465    
Entity Registrant Name EXASCALE LABS HOLDINGS INC.    
Entity Central Index Key 0002109869    
Entity Tax Identification Number 42-3035215    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 820 Gessner Road    
Entity Address, Address Line Two Suite 332    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77024    
City Area Code 650    
Local Phone Number 537-7553    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 87,600
Documents Incorporated by Reference [Text Block] None.    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 7000    
Auditor Name HTL International, LLC    
Auditor Location Houston, Texas    
Class A Common Stock, $0.0001 par value per share      
Title of 12(b) Security Class A Common Stock, $0.0001 par value per share    
Trading Symbol XLAB    
Security Exchange Name NASDAQ    
Warrants, each whole warrant exercisable for one Class A Common Stock at an exercise price of $11.50      
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A Common Stock at an exercise price of $11.50    
Trading Symbol XLABW    
Security Exchange Name NASDAQ    
Class A Common Stock [Member]      
Entity Common Stock, Shares Outstanding   33,689,050  
Class B Common Stock [Member]      
Entity Common Stock, Shares Outstanding   30,645,739