Fair Value Disclosures - Summary of financial instruments not measured at fair value (Details 1) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and restricted cash	$ 1,503	$ 4,775
Finance receivables	161,696	168,600
Repossessed assets	1,208	658
Note Payable	0	3,244
Credit facility	59,500	55,000
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and restricted cash	1,503	4,775
Finance receivables	161,696	168,600
Repossessed assets	1,208	658
Note Payable	0	3,244
Credit facility	59,500	55,000
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and restricted cash	1,503	4,775
Finance receivables	0	0
Repossessed assets	0	0
Note Payable	0	3,244
Credit facility	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and restricted cash	0	0
Finance receivables	0	0
Repossessed assets	0	0
Note Payable	0	0
Credit facility	0	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and restricted cash	0	0
Finance receivables	161,696	168,600
Repossessed assets	1,208	658
Note Payable	0	0
Credit facility	$ 59,500	$ 55,000