Property and Equipment - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment	$ 2,872	$ 2,747
Less accumulated depreciation	(2,381)	(2,239)
Property and equipment, net	679	563
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment	112	112
Manufacturing Equipment
Property Plant And Equipment [Line Items]
Property and equipment	987	1,001
Computer and Office Equipment
Property Plant And Equipment [Line Items]
Property and equipment	97	102
System and Laser
Property Plant And Equipment [Line Items]
Property and equipment	1,295	1,204
Software
Property Plant And Equipment [Line Items]
Property and equipment	293	240
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment	50	50
Transportation Equipment
Property Plant And Equipment [Line Items]
Property and equipment	38	38
Construction in Progress
Property Plant And Equipment [Line Items]
Construction in progress	$ 188	$ 55