Certain Balance Sheet Accounts - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 2,918	$ 3,370
Less: accumulated depreciation and amortization	(2,628)	(3,268)
Property and equipment, net	290	102
Tooling and manufacturing equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	2,249	2,618
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	421	322
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	198	289
Software
Property, Plant and Equipment [Line Items]
Total property and equipment	47	106
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 3	$ 35