Certain Balance Sheet Accounts - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 3,370	$ 3,760
Less: accumulated depreciation and amortization	(3,268)	(3,383)
Property and equipment, net	102	377
Tooling and manufacturing equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	2,618	2,632
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	322	348
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	289	639
Software
Property, Plant and Equipment [Line Items]
Total property and equipment	106	106
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 35	$ 35