v3.26.1
SUBSEQUENT EVENTS (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 05, 2026
USD ($)
$ / shares
shares
May 18, 2026
USD ($)
Apr. 01, 2026
$ / shares
shares
Dec. 07, 2025
USD ($)
$ / shares
Jan. 31, 2026
USD ($)
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 31, 2025
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
$ / shares
Apr. 27, 2026
USD ($)
SUBSEQUENT EVENTS                    
Par value | $ / shares       $ 0.00001   $ 0.0001   $ 0.0001 $ 0.0001  
Stock options forfeited | shares           12,179 555,215 908,888    
Proceeds from convertible promissory notes           $ 4,300,000   $ 10,000,000    
Restricted stock units                    
SUBSEQUENT EVENTS                    
Grant date fair value of RSU | $ / shares                 $ 1.28  
Convertible promissory note                    
SUBSEQUENT EVENTS                    
Proceeds from convertible promissory notes         $ 300,000          
Cartesian Growth Corporation III                    
SUBSEQUENT EVENTS                    
Conversion ratio       1            
Par value | $ / shares       $ 0.00001            
Factorial equity value       $ 1,100,000            
Subsequent Event                    
SUBSEQUENT EVENTS                    
Gross proceeds $ 112,100,000                  
Stock options forfeited | shares     90,000              
Subsequent Event | Factorial Germany GmbH                    
SUBSEQUENT EVENTS                    
Consideration on disposal                   $ 6,000
Subsequent Event | Restricted stock units                    
SUBSEQUENT EVENTS                    
Grant date fair value of RSU | $ / shares     $ 250              
Shares issued | shares     100,000              
Subsequent Event | PubCo Series A Common stock                    
SUBSEQUENT EVENTS                    
Par value | $ / shares $ 0.00001                  
Subsequent Event | Class B ordinary shares                    
SUBSEQUENT EVENTS                    
Par value | $ / shares $ 0.00001                  
Subsequent Event | PowerCo | PubCo Series A Common stock                    
SUBSEQUENT EVENTS                    
Conversion ratio 3.67                  
Issuable shares | shares 100,000                  
Subsequent Event | Convertible promissory note                    
SUBSEQUENT EVENTS                    
Proceeds from convertible promissory notes   $ 1,040,000                
Subsequent Event | Convertible promissory note | January 2026 Notes                    
SUBSEQUENT EVENTS                    
Proceeds from convertible promissory notes         $ 4,300,000          
Subsequent Event | Cartesian Growth Corporation III                    
SUBSEQUENT EVENTS                    
Conversion ratio 1                  
Factorial equity value $ 1,100,000,000                  
Subsequent Event | Cartesian Growth Corporation III | PubCo Series A Common stock                    
SUBSEQUENT EVENTS                    
Par value | $ / shares $ 0.00001