Property, Plant and Equipment, net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 53,515	$ 52,969
Less accumulated depreciation	(33,385)	(31,921)
Total property, plant and equipment, net	20,130	21,048
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,565	1,565
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	17,920	17,834
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	32,073	31,707
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	640	778
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	900	857
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 417	$ 228