Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 4) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Over 120 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 0
Total (in percentage)	0.00%
Finance receivables
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 176,025		$ 188,397
Finance receivables | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	22,545	$ 13,909	14,227
Total	$ 965	$ 445	$ 744
Total (in percentage)	4.28%	3.20%	5.23%
Finance receivables | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Balance Outstanding	$ 153,480	$ 170,195	$ 174,170
Total	$ 15,777	$ 9,657	$ 20,014
Total (in percentage)	10.28%	5.67%	11.49%
Finance receivables | 30 - 59 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 636	$ 253	$ 442
Total (in percentage)	2.82%	1.82%	3.11%
Finance receivables | 30 - 59 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 9,886	$ 6,289	$ 12,914
Total (in percentage)	6.44%	3.70%	7.41%
Finance receivables | 60 - 89 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 199	$ 101	$ 188
Total (in percentage)	0.88%	0.73%	1.32%
Finance receivables | 60 - 89 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 4,176	$ 2,430	$ 4,955
Total (in percentage)	2.72%	1.43%	2.84%
Finance receivables | 90 - 119 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total	$ 130	$ 81	$ 110
Total (in percentage)	0.58%	0.58%	0.77%
Finance receivables | 90 - 119 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 1,662	$ 896	$ 2,117
Total (in percentage)	1.08%	0.53%	1.22%
Finance receivables | Over 120 days | Direct Loans
Accounts Notes And Loans Receivable [Line Items]
Total		$ 10	$ 4
Total (in percentage)		0.07%	0.03%
Finance receivables | Over 120 days | Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Total	$ 53	$ 42	$ 28
Total (in percentage)	0.03%	0.02%	0.02%