v3.25.4
EQUITY - Equity Incentive Plans, Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 12, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2018
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                
Incremental equity-based compensation expense from plan modification   $ 0.0 $ 1.6 $ 0.7 $ 5.2      
ESPP                
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                
Number of shares authorized (in shares) 2,133,961              
Percentage of outstanding stock maximum 1.00%              
Class A                
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                
Number of shares issued gross of forfeiture (in shares)   9,514   9,514        
Class B                
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                
Number of shares issued gross of forfeiture (in shares)   8,535,845   8,535,845        
2018 Plan                
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                
Number of shares authorized (in shares)               52,346,283
Number of shares issued gross of forfeiture (in shares)   52,291,738   52,291,738   48,861,380 32,645,381  
Incremental equity-based compensation expense from plan modification           $ 6.8    
2024 Plan                
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                
Number of shares authorized (in shares)           4,635,234    
Number of shares issued gross of forfeiture (in shares)   3,212,647   3,212,647   2,866,299    
2025 Plan                
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]                
Number of shares authorized (in shares) 22,985,926              
Percentage of outstanding stock maximum 5.00%