v3.26.1
Segment Information - Summary of Financial Information with Respect to the Company's Single Operating and Reportable Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Operating revenues:    
Revenues $ 158,414 $ 107,979
Operating expenses:    
Provision for credit losses 26,586 10,603
Processing and servicing costs 9,560 6,987
Financial network and transaction costs 7,752 7,039
Advertising and activation costs 14,260 11,930
Stock-based compensation 7,100 7,500
Technology and infrastructure 3,395 2,726
Other operating expenses 9,705 6,294
Total operating expenses 98,848 72,830
Other (income) expenses:    
Interest income (824) (431)
Interest expense 1,729 1,758
Changes in fair value of earnout liabilities (3,190) (398)
Changes in fair value of public and private warrant liabilities (8,309) 352
Total other (income) expense, net (10,594) 1,281
Net income before provision for income taxes 70,160 33,868
Provision for income taxes 12,224 5,056
Net income 57,936 28,812
Service based revenue, net [Member]    
Operating revenues:    
Revenues 147,587 97,851
Transaction based revenue, net [Member]    
Operating revenues:    
Revenues 10,827 10,128
Operating Segments [Member]    
Operating revenues:    
Revenues 158,414 107,979
Operating expenses:    
Provision for credit losses 26,586 10,603
Processing and servicing costs 9,560 6,987
Financial network and transaction costs 7,752 7,039
Advertising and activation costs 14,260 11,930
Employee salaries and bonuses 15,311 15,521
Capitalized compensation costs (1,543) (1,370)
Stock-based compensation 7,102 7,517
Temporary labor and contractors 1,965 1,384
Other compensation, benefits and payroll taxes 4,755 4,199
Technology and infrastructure 3,395 2,726
Other operating expenses 9,705 6,294
Total operating expenses 98,848 72,830
Other (income) expenses:    
Interest income (824) (431)
Interest expense 1,729 1,758
Changes in fair value of earnout liabilities (3,190) (398)
Changes in fair value of public and private warrant liabilities (8,309) 352
Total other (income) expense, net (10,594) 1,281
Net income before provision for income taxes 70,160 33,868
Provision for income taxes 12,224 5,056
Net income 57,936 28,812
Operating Segments [Member] | Service based revenue, net [Member]    
Operating revenues:    
Revenues 147,587 97,851
Operating Segments [Member] | Transaction based revenue, net [Member]    
Operating revenues:    
Revenues $ 10,827 $ 10,128