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Summary of Significant Accounting and Reporting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Concentration Risk [Line Items]      
Restricted cash $ 6,463 $ 4,069  
Accounts receivable, allowance for credit loss 100 100  
Depreciation expense $ 1,200 $ 900 $ 800
Monthly service fee (as a percent) 3.00%    
Advertising Expense $ 1,100    
Finite-Lived Intangible Assets, Remaining Amortization Period 3 years    
Top Insurance Partner | Revenue from Contract with Customer Benchmark | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk (as a percent) 30.00% 34.00%  
Two Insurance Partners | Revenue from Contract with Customer Benchmark | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk (as a percent)   11.00%  
Three Insurance Partner | Revenue from Contract with Customer Benchmark | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk (as a percent)   10.00%  
Customer One | Accounts Receivable | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk (as a percent) 10.00%    
Program fees      
Concentration Risk [Line Items]      
Loan origination paid through financing arrangements (as a percent) 10.00%    
Financing arrangement duration (in months) 12 months    
Minimum      
Concentration Risk [Line Items]      
Property, plant and equipment, useful life (in years) 3 years    
Maximum      
Concentration Risk [Line Items]      
Property, plant and equipment, useful life (in years) 8 years