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Note 7 - Property, Plant and Equipment, Net (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

Useful Life

         

Asset Class

 

(Years)

  

June 30, 2023

  

December 31, 2022

 
             

Operational equipment

  3 - 10  $4,501  $1,445 

Lab equipment

  5   730   730 

Computer equipment

  3   6   6 

Office furniture and equipment

  3   90   90 

Leasehold improvements

  2.5   80   80 

Land

  -   1,141    

Building

  39   3,131    

Equipment under construction

      3,789   6,486 
       13,468   8,837 

Less: accumulated depreciation

      (1,517)  (1,494)
             

Total property, plant and equipment, net

     $11,951  $7,343