Finance Receivables - Assessment of credit quality by creditworthiness (Details 3) - Finance receivables - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Accounts Notes And Loans Receivable [Line Items]
Total	$ 111,579	$ 127,482
Finance receivables	112,244	128,170
Chapter 13 bankruptcy
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	665	688
Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	15,254	18,654
Finance receivables	15,355	18,752
Direct Loans | Chapter 13 bankruptcy
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	101	98
Performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	101,041	118,782
Performing accounts | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	13,392	16,926
Non-performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	10,538	8,700
Non-performing accounts | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	1,862	1,728
Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	96,325	108,828
Finance receivables	96,889	109,418
Contract Portfolio | Chapter 13 bankruptcy
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	564	590
Contract Portfolio | Performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	87,649	101,856
Contract Portfolio | Non-performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	$ 8,676	$ 6,972