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Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 9 Months Ended
Jan. 04, 2023
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Reverse stock split, description 1-for-32 reverse stock split effective January 5, 2023     1-for-32 reverse stock split effective January 5, 2023      
Reverse stock split, conversion ratio 0.03125     0.0003125      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued   $ 1,100,000   $ 1,100,000     $ 900,000
Interest expense and penalties       5,000.000 $ 3,000.000    
FDIC Insured Amount   42,800,000   42,800,000     $ 20,700,000
Loan origination costs   700,000 $ 1,500,000 2,700,000 3,600,000    
Subscription fees Received       $ 1      
Allowance for credit losses average term       11 days      
Capitalized costs for internally developed software   1,800,000 2,000,000 $ 5,900,000 6,400,000    
Legacy advance application software asset fully amortized and written off           $ 7,700,000  
Advertising costs   13,900,000 24,100,000 $ 38,400,000 57,100,000    
Effective Income Tax Rate       50.00%      
ATM-related fees   $ 500,000 $ 300,000 $ 1,300,000 $ 500,000    
Minimum [Member]              
Property, Plant and Equipment, Useful Life   3 years   3 years      
Maximum [Member]              
Property, Plant and Equipment, Useful Life   7 years   7 years      
Computer Software, Intangible Asset [Member]              
Finite-Lived Intangible Asset, Useful Life   3 years   3 years