Fair Value Disclosures - Summary of financial instruments not measured at fair value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit Facility		$ 29,100
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	$ 1,219	454
Cash equivalents	6,598	0
Finance receivables	50,306	106,919
Repossessed assets	395	1,491
Credit Facility	0	29,100
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	1,219	454
Cash equivalents	6,598	0
Finance receivables	50,306	105,971
Repossessed assets	395	1,491
Credit Facility	0
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	1,219	454
Cash equivalents	6,598	0
Finance receivables	0	0
Repossessed assets	0	0
Credit Facility	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	0	0
Cash equivalents	0	0
Finance receivables	0	0
Repossessed assets	0	0
Credit Facility	0	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash	0	0
Cash equivalents	0	0
Finance receivables	50,306	105,971
Repossessed assets	395	1,491
Credit Facility	$ 0	$ 29,100