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Note 7 - Property, Plant and Equipment, Net (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

June 30,

  

December 31

 
  

2025

  

2024

 
  

(in thousands)

 
         

Refinery and facilities

 $72,776  $72,776 

Land

  566   566 

Other property and equipment

  1,061   913 
   74,403   74,255 
         

Less: Accumulated depreciation and amortization

  (26,821)  (25,537)
   47,582   48,718 
         

Construction in progress

  3,735   3,715 
  $51,317  $52,433