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3. Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
    As of  
    December 31, 2020     December 31, 2019  
Land   $ 4,092     $ 4,104  
Plant and buildings     97,398       83,139  
Furniture and fixtures     1,195       1,094  
Machinery and equipment     5,188       4,252  
Construction in progress     25,397       12,571  
Property held for development     15,408       15,408  
Finance lease right of use assets     2,308       -  
Total gross property, plant & equipment     150,986       120,568  
Less accumulated depreciation     (41,106 )     (36,342 )
Total net property, plant & equipment   $ 109,880     $ 84,226  
Depreciation of property, plant, and equipment
    Years  
Plant and buildings     20 - 30  
Machinery and equipment     5 - 15  
Furniture and fixtures     3 - 5