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Note 5 - Prepaid and Other Current Assets 1 (Tables)
6 Months Ended 12 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Notes Tables    
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

June 30, 2024

  

December 31, 2023

 
  

(unaudited)

     

Prepaid expenses

 $1,666  $2,386 

Advances to suppliers

  48   79 

Other

  79   52 

Total prepaid and other current assets

 $1,793  $2,517 
  

As of December 31,

 
  

2023

  

2022

 

Prepaid expenses

 $2,386  $4,203 

Demonstration units

     281 

Advances to suppliers

  79   984 

Other

  52   713 

Total prepaid and other current assets

 $2,517  $6,181