Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Finance Receivables - Original Product - Schedule of Finance Receivables for Original Product (Detail) - Original Product [Member]
 6 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
Unit
Dec. 31, 2019
USD ($)
Unit
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding $ 324,000 $ 386,000
Reserve for credit losses (112,000) (112,000)
Finance receivables, net $ 212,000 $ 274,000
Number of active units with delinquent assessments | Unit 511 598
Amount of outstanding interest and late fees on active units $ 8,727,000 $ 9,167,000
Funded During The Current Year [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 14,000 40,000
1-2 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 16,000 15,000
2-3 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 9,000 20,000
3-4 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding 18,000 11,000
Greater Than 4 Years Outstanding [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Finance receivables outstanding $ 267,000 $ 300,000