v3.25.4
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Components of Ecosystem and Technology Fees (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Disaggregation of Revenue [Line Items]            
Total net revenue $ 156,365,000 $ 101,007,000 $ 346,952,000 $ 257,030,000 $ 340,885,000 $ 209,549,000
Ecosystem and Technology Fees            
Disaggregation of Revenue [Line Items]            
Total net revenue 31,796,000 5,179,000 70,696,000 15,332,000 20,310,000 10,215,000
Technology Offering Fees            
Disaggregation of Revenue [Line Items]            
Total net revenue 15,548,000 5,179,000 35,195,000 15,332,000 20,188,000 10,215,000
Other fee income 6,700,000   13,500,000      
Ecosystem Fees            
Disaggregation of Revenue [Line Items]            
Total net revenue 16,248,000 0 35,501,000 0 122,000 0
Other fee income 8,500,000 0 17,500,000 0    
Program Fees            
Disaggregation of Revenue [Line Items]            
Total net revenue 3,895,000 2,144,000 8,749,000 4,498,000 8,004,000 413,000
Ecosystem and Technology Fees Including Program Fees            
Disaggregation of Revenue [Line Items]            
Total net revenue $ 35,691,000 $ 7,323,000 $ 79,445,000 $ 19,830,000 $ 28,314,000 $ 10,628,000