v3.26.1
Related Party Transactions - Additional Information (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 15, 2025
Oct. 02, 2024
Jan. 10, 2024
Oct. 17, 2022
Oct. 12, 2022
Sep. 30, 2025
Aug. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Nov. 30, 2025
Oct. 08, 2025
Nov. 30, 2024
Related Party Transactions                        
Extension promissory notes - related party                   $ 280,025   $ 518,468
CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Borrowings against the note               $ 900,000        
Loan amount converted into warrants               1,500,000        
General and administrative expenses               1,330,775 $ 842,565      
Sponsor | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Monthly contribution to trust accounts per shares $ 0.01                      
Threshold extension period 6 months                      
Advance from sponsor           $ 550,000 $ 550,000          
Extension promissory notes - related party               0 0      
Private Placement Warrants | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Sale of private placement warrants (in shares)       13,350,000                
Price of warrant       $ 1                
Proceeds from sale of private placement warrants       $ 13,400,000                
Number of shares issuable per warrant       1                
Exercise price of warrants       $ 11.5                
Unsecured promissory note (the "Note") | Sponsor | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Principal amount                     $ 1,500,000  
Principal amount conversion price                     $ 1  
Borrowings against the note               900,000        
Balance available for withdrawal               600,000        
Promissory Note to Sponsor | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Maximum borrowing capacity of related party promissory note               $ 300,000        
Related Party Loans | Working capital loans warrant | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Price of warrant               $ 1        
Loan amount converted into warrants               $ 1,500,000        
Unsecured promissory note | Sponsor | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Monthly contribution to trust account   $ 150,000 $ 150,000         150,000        
Maximum aggregate amount     $ 3,150,000         3,150,000        
Monthly contribution to trust accounts per shares   $ 0.02                    
Promissory note, borrowed amount               1,500,000        
Advance from sponsor               1,500,000        
Unsecured promissory note | Sponsor | Class A ordinary shares | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Monthly contribution to trust accounts per shares   $ 0.02                    
Administrative Services Agreement | CIK_0001843477_Spring Valley Acquisition Corp. II                        
Related Party Transactions                        
Expenses per month         $ 10,000              
Expenses incurred               0 120,000      
Unpaid fees               $ 0 $ 120,000