Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 4) - Finance receivables - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 188,397		$ 211,515
Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	14,227	$ 11,844	11,423
Total	$ 744	$ 539	$ 525
Total (in percentage)	5.23%	4.55%	4.60%
Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 174,170	$ 207,247	$ 200,092
Total	$ 20,014	$ 21,179	$ 25,067
Total (in percentage)	11.49%	10.22%	12.53%
30 - 59 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 442	$ 344	$ 331
Total (in percentage)	3.11%	2.90%	2.90%
30 - 59 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 12,914	$ 14,977	$ 16,748
Total (in percentage)	7.41%	7.23%	8.37%
60 - 89 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 188	$ 136	$ 123
Total (in percentage)	1.32%	1.15%	1.08%
60 - 89 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 4,955	$ 4,290	$ 5,993
Total (in percentage)	2.84%	2.07%	3.00%
90 - 119 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 110	$ 59	$ 68
Total (in percentage)	0.77%	0.50%	0.60%
90 - 119 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 2,117	$ 1,893	$ 2,279
Total (in percentage)	1.22%	0.91%	1.14%
Over 120 days \| Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 4		$ 3
Total (in percentage)	0.03%		0.03%
Over 120 days \| Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 28	$ 19	$ 47
Total (in percentage)	0.02%	0.01%	0.02%