Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment and Leased Facilities and Equipment - Summary of Property, Plant and Equipment (Details)

v3.22.1
Property, Plant and Equipment and Leased Facilities and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 125,531 $ 121,882
Accumulated depreciation (92,665) (90,704)
Property, plant and equipment, net 32,866 31,178
Land    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 4,416 4,216
Buildings    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 25,742 25,044
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 65,625 62,498
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 1,276 1,276
Transportation equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 2,363 2,104
Improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 15 years  
Property, plant and equipment, gross $ 23,404 23,652
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 705 $ 3,092
Right-of-use asset    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 15 years  
Property, plant and equipment, gross $ 2,000  
Minimum    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 3 years  
Minimum | Buildings    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 10 years  
Minimum | Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 3 years  
Minimum | Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 3 years  
Minimum | Transportation equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 2 years  
Maximum    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 25 years  
Maximum | Buildings    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 25 years  
Maximum | Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 15 years  
Maximum | Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 5 years  
Maximum | Transportation equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 5 years