Finance Receivables - Assessment of credit quality by creditworthiness (Details 2) - Finance receivables - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Accounts Notes And Loans Receivable [Line Items]
Total	$ 178,519	$ 184,104
Finance receivables	178,786	184,237
Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	24,376	13,909
Finance receivables	24,389	13,919
Performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	174,078	180,545
Performing accounts | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	24,102	13,717
Non-performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	4,441	3,559
Non-performing accounts | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	274	192
Chapter 13 bankruptcy
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	267	133
Chapter 13 bankruptcy | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	13	10
Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	154,143	170,195
Finance receivables	154,397	170,318
Contract Portfolio | Performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	149,976	166,828
Contract Portfolio | Non-performing accounts
Accounts Notes And Loans Receivable [Line Items]
Total	4,167	3,367
Contract Portfolio | Chapter 13 bankruptcy
Accounts Notes And Loans Receivable [Line Items]
Finance receivables	$ 254	$ 123