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Note 4 - Property, Plant and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2025
Notes Tables  
Property, Plant and Equipment [Table Text Block]
      

December 31,

 

Asset Class

 

Useful Life (Years)

  

2025

  

2024

 
             

Operational equipment

  3 - 10  $3,456  $3,551 

Lab equipment

  5   1,031   1,128 

Computer equipment

  3   107   107 

Office furniture and equipment

  3   87   87 

Leasehold improvements

  2.5   80   80 

Land

  -      1,141 

Building

  39      3,131 

Equipment under construction

      3,990   9,726 
       8,751   18,951 

Less: accumulated depreciation

      (2,988)  (2,478)
             

Property, plant and equipment, net

     $5,763  $16,473