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Property, Plant and Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2025
Property, Plant and Equipment, Net [Abstract]  
Schedule of Property, Plant and Equipment, Net

The components of property, plant and equipment are as follows:

 

   September 30,   December 31, 
   2025   2024 
   (in thousands) 
Mining equipment and machinery  $158   $158 
Other furniture and equipment   350    350 
    508    508 
Less: Accumulated depreciation   (486)   (486)
   $22   $22