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Note 3 - Property, Plant and Equipment (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   

As of

 
   

June 30, 2023

   

December 31, 2022

 

Land

  $ 7,348     $ 7,344  

Plant and buildings

    141,238       99,116  

Furniture and fixtures

    1,934       1,831  

Machinery and equipment

    14,984       15,209  

Construction in progress

    52,731       88,934  

Property held for development

    15,431       15,437  

Finance lease right of use assets

    2,889       3,045  

Total gross property, plant & equipment

    236,555       230,972  

Less accumulated depreciation

    (53,772 )     (50,531 )

Total net property, plant & equipment

  $ 182,783     $ 180,441  
Depreciation Of Property, Plant, and Equipment [Table Text Block]
   

Years

 

Plant and buildings

    20 - 30  

Machinery and equipment

    5 - 15  

Furniture and fixtures

    3 - 5