Furniture, Fixtures, and Equipment - Summary of Furniture, Fixtures, and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Furniture, fixtures and equipment, gross	$ 33,371	$ 17,839
Less: accumulated depreciation	10,063	10,437
Furniture, fixtures, and equipment, net	23,308	7,402
Depreciation expense	2,731	2,684	$ 2,040
Computer hardware and software
Property, Plant and Equipment [Line Items]
Furniture, fixtures and equipment, gross	6,859	6,156
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Furniture, fixtures and equipment, gross	2,003	2,698
Leasehold improvements
Property, Plant and Equipment [Line Items]
Furniture, fixtures and equipment, gross	22,687	6,755
Office equipment
Property, Plant and Equipment [Line Items]
Furniture, fixtures and equipment, gross	$ 1,822	$ 2,230

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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