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Note 3 - Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

As of

 
  

March 31, 2023

  

December 31, 2022

 

Land

 $7,347  $7,344 

Plant and buildings

  137,558   99,116 

Furniture and fixtures

  1,927   1,831 

Machinery and equipment

  14,946   15,209 

Tenant improvements

  56   56 

Construction in progress

  52,573   88,934 

Property held for development

  15,431   15,437 

Finance lease right of use assets

  3,042   3,045 

Total gross property, plant & equipment

  232,880   230,972 

Less accumulated depreciation

  (52,072)  (50,531)

Total net property, plant & equipment

 $180,808  $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