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Property, Plant and Equipment, net (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 53,864 $ 53,515
Less accumulated depreciation (34,042) (33,385)
Total property, plant and equipment, net 19,822 20,130
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 17,961 17,920
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 32,420 32,073
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 640 640
Office Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 900 900
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 378 $ 417