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Finance Receivables (Detail Textuals) - USD ($)
9 Months Ended
Dec. 31, 2018
Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Finance receivables, net $ 219,210,000 $ 266,573,000
Period for maintaining historical write off information with respect to static pool 10 years  
Percentage of liquidation level assist in determining allowance for credit losses for 1st snapshot 20.00%  
Percentage of liquidation level assist in determining allowance for credit losses for 2nd snapshot 40.00%  
Percentage of liquidation level assist in determining allowance for credit losses for 3rd snapshot 60.00%  
Percentage of liquidation level assist in determining allowance for credit losses in 4th snapshot 80.00%  
Percentage of liquidation level assist in determining allowance for credit losses in 5th snapshot 100.00%  
Finance receivables | Direct Loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of direct loan to total loan portfolio 3.40%  
Finance receivables | Direct Loans | Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Finance receivables, net $ 500  
Finance receivables | Direct Loans | Maximum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Finance receivables, net $ 11,000