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Note 4 - Segment Information (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
  

Three Months ended March 31,

 
  

2024

  

2023

 

Revenue:

        

United States

 $3,955  $3,229 

Canada

  1,044   641 

Total revenue

 $4,999  $3,870