Property, Plant and Equipment - Summary of property, plant and equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment
Property, plant and equipment, Gross	$ 33,694	$ 32,473
Less accumulated depreciation and amortization	(23,038)	(21,916)
Property, plant and equipment, net	10,656	10,557
Land
Property, Plant and Equipment
Property, plant and equipment, Gross	7	7
Buildings
Property, Plant and Equipment
Property, plant and equipment, Gross	11,843	11,363
Machinery, equipment and tooling
Property, Plant and Equipment
Property, plant and equipment, Gross	20,757	20,689
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, Gross	$ 1,087	$ 414