v3.26.1
RELATED PARTY TRANSACTIONS - Additional Information (Details) - USD ($)
6 Months Ended 9 Months Ended
Feb. 24, 2026
Oct. 23, 2024
Oct. 02, 2024
Jul. 22, 2024
Mar. 28, 2024
Mar. 14, 2024
Aug. 08, 2023
Jun. 30, 2026
Jun. 30, 2025
Dec. 04, 2024
Feb. 23, 2026
Dec. 31, 2025
Jul. 21, 2025
Jul. 11, 2025
Oct. 31, 2024
Mar. 13, 2024
Jan. 19, 2023
RELATED PARTY TRANSACTIONS                                  
Accrued expenses               $ 1,189,423       $ 1,169,888          
Amount outstanding               $ 500,000       $ 500,000          
Other Liability, Noncurrent, Related Party, Type [Extensible Enumeration]               Related Party       Related Party          
Proceeds from working capital loan - related party               $ 435,771                  
Outstanding note               2,257,771       $ 1,822,000          
Advance from related party               $ 1,485,000       $ 1,485,000          
Common Class A                                  
RELATED PARTY TRANSACTIONS                                  
Ordinary shares, par value (in dollars per share)               $ 0.0001       $ 0.0001          
Mustang Sponsor LLC                                  
RELATED PARTY TRANSACTIONS                                  
Trust assets available for working capital loan repayment               $ 0                  
Sponsor                                  
RELATED PARTY TRANSACTIONS                                  
Payment for expenses by sponsor     $ 1,485,000                            
Administrative Services Agreement | Affiliate of the Sponsor                                  
RELATED PARTY TRANSACTIONS                                  
Expenses per month               10,000                  
Expenses incurred               30,000 $ 60,000                
Accrued expenses               $ 400,000       $ 340,000          
Related Party Loans | Sponsor | Working Capital Loan                                  
RELATED PARTY TRANSACTIONS                                  
Price of warrant (in dollars per share)               $ 2                  
Related Party Loans | Sponsor | Mustang Sponsor LLC                                  
RELATED PARTY TRANSACTIONS                                  
Maximum borrowing capacity of related party promissory note                                 $ 500,000
Borrowings available               $ 0       0          
Related Party Loans | Sponsor | Mustang Sponsor LLC | Working Capital Loan                                  
RELATED PARTY TRANSACTIONS                                  
Loan conversion agreement warrant               $ 1,500,000                  
Price of warrant (in dollars per share)               $ 2                  
Ordinary shares, par value (in dollars per share)               $ 0.0001                  
Amount outstanding               $ 500,000       $ 500,000          
Other Liability, Noncurrent, Related Party, Type [Extensible Enumeration]               us-gaap:NonrelatedPartyMember       us-gaap:NonrelatedPartyMember          
Related Party Loans | Sponsor | Mustang Sponsor LLC | Working Capital Loan | Common Class A                                  
RELATED PARTY TRANSACTIONS                                  
Price of warrant (in dollars per share)               $ 2                  
August 2023 promissory note with related party | Sponsor                                  
RELATED PARTY TRANSACTIONS                                  
Maximum borrowing capacity of related party promissory note             $ 500,000                    
Proceeds from working capital loan - related party             $ 500,000                    
Borrowings available               $ 0       $ 0          
March 2024 note | Sponsor                                  
RELATED PARTY TRANSACTIONS                                  
Maximum borrowing capacity of related party promissory note                               $ 500,000  
Proceeds from working capital loan - related party       $ 140,000 $ 235,000 $ 125,000                      
Borrowings available               0       0          
Outstanding note               500,000       500,000          
October 2024 Promissory Note | Starwood Capital Group Management LLC                                  
RELATED PARTY TRANSACTIONS                                  
Borrowings available               0                  
Outstanding note               400,000       400,000          
Principal amount of note                             $ 400,000    
2024 Note and the October 2024 Promissory Note                                  
RELATED PARTY TRANSACTIONS                                  
Aggregate amount of deposit into the trust account for its public stockholders   $ 50,000 $ 50,000             $ 225,000              
February 2026 Promissory note | Sponsor                                  
RELATED PARTY TRANSACTIONS                                  
Maximum borrowing capacity of related party promissory note                     $ 435,771            
Proceeds from working capital loan - related party $ 435,771                                
Borrowings available               0                  
July 11th Note | Sponsor                                  
RELATED PARTY TRANSACTIONS                                  
Borrowings available               0       0          
Outstanding note               150,000       150,000          
Principal amount of note                           $ 150,000      
July 21st Note | Madison Grose                                  
RELATED PARTY TRANSACTIONS                                  
Borrowings available               0       0          
Outstanding note               $ 272,000       $ 272,000          
Principal amount of note                         $ 272,000