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Note 9 - Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  For the Three Months Ended September 30,  For the Nine Months Ended September 30, 
  

2025

  

2024

  

2025

  

2024

 

Sales and marketing

 $210  $315  $708  $968 

Research and development

  154   318   573   827 

General and administrative

  280   616   1,547   1,725 

Total non-cash stock compensation expense

 $644  $1,249  $2,828  $3,520 
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
          

Wtd. Avg.

     
          

Remaining

  

Aggregate

 
      

Weighted Avg.

  

Contractual

  

Intrinsic

 
  

Shares

  

Exercise Price

  

Life (Yrs)

  

Value

 

Outstanding as of December 31, 2024

  5  $27.57   4.1  $ 

Granted

  25   1.26     $ 

Outstanding as of September 30, 2025

  30  $5.99   8.3  $ 

Vested and expected to vest at September 30, 2025

  30  $5.99   8.3  $ 

Exercisable as of September 30, 2025

  5  $27.57   3.4  $ 
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
      

Weighted

 
      

Average

 
      

Grant Date

 
  

Shares

  

Fair Value

 

Unvested at December 31, 2024

  419  $7.85 

Granted

  2,672   1.05 

Vested

  (1,390)  2.33 

Canceled and forfeited

  (48)  1.66 

Unvested at September 30, 2025

  1,653  $1.69