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Property, Plant and Equipment, net (Tables)
6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
          
   June 30,
2021
   December 31,
2020
 
Land  $1,565   $1,565 
Buildings and improvements   17,795    17,834 
Machinery and equipment   31,723    31,707 
Vehicles   778    778 
Office equipment   862    857 
Construction in process   440    228 
    53,163    52,969 
Less accumulated depreciation   (32,492)   (31,921)
Total property, plant and equipment, net  $20,671   $21,048