Quarterly report pursuant to Section 13 or 15(d)

Finance Receivables - Original Product - Schedule of Finance Receivables for Original Product (Detail)

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Finance Receivables - Original Product - Schedule of Finance Receivables for Original Product (Detail) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables, net $ 54,000 $ 53,000
Original Product [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 226,000 258,000
Reserve for credit losses (125,000) (142,000)
Finance receivables, net 101,000 116,000
Original Product [Member] | Funded During The Current Year [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 13,000 25,000
Original Product [Member] | 1-2 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 13,000 12,000
Original Product [Member] | 2-3 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 9,000 9,000
Original Product [Member] | 3-4 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 6,000 12,000
Original Product [Member] | Greater Than 4 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding $ 185,000 $ 200,000