Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 23,484		$ 23,601
Less: accumulated depreciation	(15,527)		(15,711)
Property and equipment, net	7,957		7,890
Depreciation	200	$ 200
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,529		11,124
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	884		887
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	71		75
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,098		5,069
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,902		$ 6,446