v3.26.1
Related Party Transactions - Related-Party Participation in Equity Financings (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 10 Months Ended
Jan. 23, 2026
USD ($)
entity
$ / shares
shares
Aug. 14, 2025
USD ($)
entity
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Jul. 31, 2026
May 31, 2026
USD ($)
note
Apr. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
$ / shares
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
$ / shares
Jun. 30, 2026
USD ($)
shares
Dec. 31, 2025
USD ($)
shares
Feb. 13, 2025
shares
Related Party Transaction [Line Items]                            
Preferred stock, shares issued (in shares) | shares               116,141,488   116,141,488   116,141,488 101,948,458  
Proceeds from issuance of Series Seed preferred stock, net of issuance costs                   $ 0 $ 7,945,686      
Accounts payable               $ 4,567,617   4,567,617   $ 4,567,617 $ 2,082,547  
Promissory Note                            
Related Party Transaction [Line Items]                            
Interest rate (as a percent)     4.07%           4.07%   4.07%      
Aggregate outstanding principal               $ 2,711,748   $ 2,711,748   $ 2,711,748    
Promissory Note | Recourse                            
Related Party Transaction [Line Items]                            
Amount pledged as a percentage of shares purchased (as a percent)         50.00%                  
Promissory Note | Nonrecourse                            
Related Party Transaction [Line Items]                            
Amount pledged as a percentage of shares purchased (as a percent)         50.00%                  
Chief Operating Officer                            
Related Party Transaction [Line Items]                            
Preferred stock, purchase price per share (in dollars per share) | $ / shares     $ 0.21           $ 0.21   $ 0.21      
Sale of stock, total purchase price     $ 453,600                      
Chief Executive Officer                            
Related Party Transaction [Line Items]                            
Preferred stock, purchase price per share (in dollars per share) | $ / shares     $ 0.21           $ 0.21   $ 0.21      
Sale of stock, total purchase price     $ 719,250                      
Ms. Marrocco | Promissory Note                            
Related Party Transaction [Line Items]                            
Promissory notes, principal amount     453,600           $ 453,600   $ 453,600      
Mr. Terrani | Promissory Note                            
Related Party Transaction [Line Items]                            
Promissory notes, principal amount     $ 719,250           719,250   719,250      
Mr. Harrill | Promissory Note                            
Related Party Transaction [Line Items]                            
Promissory notes, principal amount         $ 1,538,898                  
Interest rate (as a percent)         4.08%                  
Number of promissory notes | note         2                  
Series Seed-1                            
Related Party Transaction [Line Items]                            
Shares issued upon conversion (in shares) | shares                           65,000,000
Preferred stock, shares issued (in shares) | shares               65,000,000   65,000,000   65,000,000 65,000,000  
Series A                            
Related Party Transaction [Line Items]                            
Preferred stock, shares issued (in shares) | shares   26,948,464           26,948,464   26,948,464   26,948,464 26,948,464  
Preferred stock, purchase price per share (in dollars per share) | $ / shares   $ 2.5976                        
Proceeds from issuance of Series Seed preferred stock, net of issuance costs   $ 70,000,000.0                        
Number of affiliated entities | entity   2                        
Series A-2                            
Related Party Transaction [Line Items]                            
Preferred stock, shares issued (in shares) | shares 14,193,030             14,193,030   14,193,030   14,193,030    
Preferred stock, purchase price per share (in dollars per share) | $ / shares $ 4.932                          
Proceeds from issuance of Series Seed preferred stock, net of issuance costs $ 70,000,000.0                          
Common Class B | Chief Operating Officer                            
Related Party Transaction [Line Items]                            
Stock issued during period, shares, new issues (in shares) | shares     2,160,000                      
Common Class B | Chief Executive Officer                            
Related Party Transaction [Line Items]                            
Stock issued during period, shares, new issues (in shares) | shares     3,425,000                      
Related Party                            
Related Party Transaction [Line Items]                            
Investor rights agreement, ownership of company's stock, percentage 5.00%                          
Related Party | Subsequent Event                            
Related Party Transaction [Line Items]                            
Investor rights agreement, registration rights, term       5 years                    
Related Party | Framatome LLC                            
Related Party Transaction [Line Items]                            
License income               $ 0 0 $ 0 0      
Equipment lease income               0 $ 0 0 $ 0      
Accounts payable               900,000   900,000   $ 900,000 $ 0  
Related Party | Neutroelectric, LLC                            
Related Party Transaction [Line Items]                            
Master services agreement, term             2 years              
Related party expenses                       350,000    
Related Party | Container Technologies Industries, LLC                            
Related Party Transaction [Line Items]                            
Related party expenses               100,000   100,000        
Reimbursement rate for allowable expenditures           50.00%                
Time to request reimbursement from receipt of funds           5 days                
Invoiced reimbursement amount               56,036   56,036        
Reimbursement Received                   0        
Accounts receivable and contract assets, net               $ 56,036   $ 56,036   $ 56,036    
Related Party | Series Seed-1                            
Related Party Transaction [Line Items]                            
Shares issued upon conversion (in shares) | shares                           9,850,000
Related Party | Series A                            
Related Party Transaction [Line Items]                            
Preferred stock, purchase price per share (in dollars per share) | $ / shares   $ 2.5976                        
Proceeds from issuance of Series Seed preferred stock, net of issuance costs   $ 8,800,000                        
Investment percentage in offering (as a percent)   12.60%                        
Related Party | Series A-2                            
Related Party Transaction [Line Items]                            
Preferred stock, purchase price per share (in dollars per share) | $ / shares $ 4.932                          
Proceeds from issuance of Series Seed preferred stock, net of issuance costs $ 5,000,000.0                          
Investment percentage in offering (as a percent) 7.10%                          
Affiliated Entity | Series Seed-1                            
Related Party Transaction [Line Items]                            
Shares issued upon conversion (in shares) | shares                           9,850,000
Affiliated Entity | Series A-2                            
Related Party Transaction [Line Items]                            
Number of affiliated entities | entity 2