Variable Interest Entity - Summary of Assets and Liabilities Held by VIE (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020	Mar. 31, 2019
Assets
Restricted cash	$ 13,601	$ 7,882
Finance receivables, net	179,035	199,781
Repossessed assets	856	1,340
Total assets	225,746	238,818
Liabilities
Credit facility, net of debt issuance costs	106,639	124,255
Accounts payable and accrued expenses	3,129	4,332
Total liabilities	115,602	131,239
Variable Interest Entity
Assets
Restricted cash	13,601	7,882	$ 7,882
Finance receivables, net	157,845	165,966	165,966
Repossessed assets	803	1,277	1,277
Total assets	172,249	175,125	175,125
Liabilities
Credit facility, net of debt issuance costs	106,639	124,255	124,255
Accounts payable and accrued expenses	460	597	597
Total liabilities	$ 107,099	$ 124,852	$ 124,852