Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 4) - Finance receivables - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 198,007		$ 221,876
Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	12,720	$ 11,844	9,480
Total	$ 560	$ 539	$ 390
Total (in percentage)	4.40%	4.55%	4.11%
Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 185,287	$ 207,247	$ 212,396
Total	$ 15,796	$ 21,179	$ 20,919
Total (in percentage)	8.53%	10.22%	9.85%
30 - 59 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 349	$ 344	$ 219
Total (in percentage)	2.74%	2.90%	2.31%
30 - 59 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 10,232	$ 14,977	$ 13,981
Total (in percentage)	5.52%	7.23%	6.58%
60 - 89 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 159	$ 136	$ 115
Total (in percentage)	1.25%	1.15%	1.21%
60 - 89 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 3,962	$ 4,290	$ 4,950
Total (in percentage)	2.14%	2.07%	2.33%
90 - 119 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 52	$ 59	$ 56
Total (in percentage)	0.41%	0.50%	0.59%
90 - 119 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 1,560	$ 1,893	$ 1,946
Total (in percentage)	0.84%	0.91%	0.92%
Over 120 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 42	$ 19	$ 42
Total (in percentage)	0.02%	0.01%	0.02%