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Note 5 - Shareholders' Equity (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three Months Ended September 30,

  

Nine Months Ended September 30,

 
  

2022

  

2021

  

2022

  

2021

 

Cost of revenues (excluding depreciation and amortization)

 $44  $31  $126  $82 

Product development

  151   111   428   329 

Sales and marketing

  98   76   283   217 

Other general and administrative

  625   644   1,772   1,632 

Total stock-based compensation expense

 $918  $862  $2,609  $2,260