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Summary of Significant Accounting Policies (Detail Textuals)
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2019
Mar. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2020
USD ($)
Segment
Unit
Mar. 31, 2019
USD ($)
Significant Accounting Policies [Line Items]            
Number of reportable segments | Segment         1  
Increase in marketing expenses           $ 1,000,000
Allowance for credit losses and provision expense       $ 151,000    
Charge-offs     $ 6,400,000      
Number of reporting unit | Unit         1  
Goodwill impairment charge         $ 295,000  
Uncertain tax positions   $ 0 $ 0   $ 0 $ 0
Interest income accrual on finance receivables suspension condition         Accrual of interest income on finance receivables is suspended when a loan is contractually delinquent for 61 days or more or the collateral is repossessed, whichever is earlier. As of February 2019, Chapter 13 bankruptcy accounts are charged-off. Prior to February 2019, Chapter 13 bankruptcy accounts were accounted for under the cost-recovery method.  
Average dealer discount associated with new volume         7.90% 8.20%
Monthly servicing fee percent of outstanding financed receivables   2.50%        
Maximum            
Significant Accounting Policies [Line Items]            
Criteria for receivable to be delinquent account 181 days         181 days
Minimum            
Significant Accounting Policies [Line Items]            
Criteria for receivable to be delinquent account 121 days         121 days