v3.26.3
Segment Information - Summary of Financial Information with Respect to the Company's Single Operating and Reportable Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Operating revenues:        
Revenues $ 197,704 $ 150,725 $ 526,911 $ 390,461
Operating expenses:        
Provision for credit losses 36,549 29,846 91,953 65,744
Processing and servicing costs 12,832 9,404 32,691 23,561
Financial network and transaction costs 10,383 7,378 26,102 21,644
Advertising and activation costs 27,959 18,911 62,577 46,297
Employee salaries and bonuses 17,622 14,887 48,745 45,307
Capitalized compensation costs (2,069) (1,703) (6,062) (4,805)
Stock-based compensation 22,013 7,209 45,464 23,011
Temporary labor and contractors 2,355 1,722 6,477 4,569
Other compensation, benefits and payroll taxes 3,375 2,727 12,001 10,441
Technology and infrastructure 4,487 3,192 11,733 8,812
Other operating expenses 14,181 11,254 35,406 23,751
Total operating expenses 149,687 104,827 367,087 268,332
Other (income) expenses:        
Interest income (2,196) (294) (4,348) (1,313)
Interest expense 2,062 1,789 5,811 5,324
Changes in fair value of earnout liabilities (8,467) (4,841) (415) 2,655
Changes in fair value of warrant liabilities (17,881) (9,186) (554) 11,657
Total other (income) expense, net (26,482) (12,532) 494 18,323
Net income before provision for income taxes 74,499 58,430 159,330 103,806
Provision (benefit) for income taxes 10,712 (33,642) 30,920 (26,118)
Net income 63,787 92,072 128,410 129,924
Service based revenue, net [Member]        
Operating revenues:        
Revenues 186,349 139,229 493,983 358,673
Transaction based revenue, net [Member]        
Operating revenues:        
Revenues $ 11,355 $ 11,496 $ 32,928 $ 31,788