Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 23,719		$ 23,719		$ 23,601
Less: accumulated depreciation	(16,040)		(16,040)		(15,711)
Property and equipment, net	7,679		7,679		7,890
Depreciation	200	$ 200	700	$ 500
Construction in progress
Property, Plant and Equipment [Line Items]
Impairment of equipment to be sold	200
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,193		14,193		11,124
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	890		890		887
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	73		73		75
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,101		5,101		5,069
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,462		$ 3,462		$ 6,446