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Note 12 - Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three months ended June 30,

  

Six months ended June 30,

 
  

2025

  

2024

  

2025

  

2024

 

Research and development

 $316  $499   1,011   1,708 

Sales and marketing

  126   3   255   185 

General and administrative

  718   1,238   2,395   2,861 

Total stock-based compensation

 $1,160  $1,740  $3,661  $4,754