Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 4) - Finance receivables - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 176,784		$ 198,007
Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	18,844	$ 13,909	12,720
Total	$ 614	$ 445	$ 560
Total (in percentage)	3.26%	3.20%	4.40%
Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 157,940	$ 170,195	$ 185,287
Total	$ 11,938	$ 9,657	$ 15,796
Total (in percentage)	7.56%	5.67%	8.53%
30 - 59 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 416	$ 253	$ 349
Total (in percentage)	2.21%	1.82%	2.74%
30 - 59 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 7,990	$ 6,289	$ 10,232
Total (in percentage)	5.06%	3.70%	5.52%
60 - 89 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 145	$ 101	$ 159
Total (in percentage)	0.77%	0.73%	1.25%
60 - 89 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 2,905	$ 2,430	$ 3,962
Total (in percentage)	1.84%	1.43%	2.14%
90 - 119 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 53	$ 81	$ 52
Total (in percentage)	0.28%	0.58%	0.41%
90 - 119 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 1,024	$ 896	$ 1,560
Total (in percentage)	0.65%	0.53%	0.84%
Over 120 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total		$ 10
Total (in percentage)		0.07%
Over 120 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 19	$ 42	$ 42
Total (in percentage)	0.01%	0.02%	0.02%