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Note 11 - Segment Information (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
  

Year Ended December 31,

 
  

2022

  

2021

 

Revenue:

        

United States

 $15,313  $11,385 

Canada

  3,609   3,240 

Other countries

  163   167 

Total revenue

 $19,085  $14,792