Property, Plant and Equipment - Summary of property, plant and equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment
Property, plant and equipment, Gross	$ 24,056	$ 23,366
Less accumulated depreciation and amortization	(17,078)	(16,011)
Property, plant and equipment, net	6,978	7,355
Buildings and building improvements
Property, Plant and Equipment
Property, plant and equipment, Gross	8,447	7,838
Machinery, equipment and tooling
Property, Plant and Equipment
Property, plant and equipment, Gross	15,503	14,526
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, Gross	$ 106	$ 1,002