Fair Value Measurement - Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Financial assets:
Other investments	$ 16,591	$ 19,820
Investments held in trust	276,083	276,016
Total financial assets	292,674	295,836
Financial liabilities:
Warrant liability	917	2,883
Secured financing	12,931	13,818
Total financial liabilities	13,848	16,701
Reported Value Measurement
Financial assets:
Other investments	11,361	10,853
Investments held in trust	276,000	276,000
Total financial assets	287,361	286,853
Level 1
Financial assets:
Other investments	3,660	6,002
Investments held in trust	276,083	276,016
Total financial assets	279,743	282,018
Financial liabilities:
Warrant liability	790	2,484
Secured financing	0	0
Total financial liabilities	790	2,484
Level 2
Financial assets:
Other investments	0	0
Investments held in trust	0	0
Total financial assets	0	0
Financial liabilities:
Warrant liability	127	399
Secured financing	0	0
Total financial liabilities	127	399
Level 3
Financial assets:
Other investments	12,931	13,818
Investments held in trust	0	0
Total financial assets	12,931	13,818
Financial liabilities:
Warrant liability	0	0
Secured financing	12,931	13,818
Total financial liabilities	$ 12,931	$ 13,818