Certain Balance Sheet Accounts - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 2,865	$ 3,370
Less: accumulated depreciation and amortization	(2,679)	(3,268)
Property and equipment, net	186	102
Tooling and manufacturing equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	2,164	2,618
Computer equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	380	322
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	212	289
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	$ 3	$ 35