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Note 8 - Share-based Compensation (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Schedule of Employee Service Share Based Compensation Allocation of Recognized Period Costs, By Award Type [Table Text Block]
   

Three Months Ended

 
   

March 31,

 

Share-based compensation related to:

 

2025

   

2024

 

Common stock grants

  $ 100     $ 100  

Stock option grants

    108       113  

Restricted Stock Unit Awards ("RSUs")

    2,004       1,300  

Total share-based compensation

  $ 2,212     $ 1,513  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
   

Shares Under Options

   

Weighted Average Exercise Price (per share)

   

Weighted Average Remaining Contractual Life (in years)

   

Aggregate Intrinsic Value (in thousands)

 

Outstanding at December 31, 2024

    73,232     $ 67.15                  

Granted

    -       -                  

Exercised

    (7,024 )     45.26                  

Outstanding at March 31, 2025

    66,208     $ 69.47       4.57     $ 8,931  

Exercisable at March 31, 2025

    63,250     $ 60.51       4.35     $ 8,931  

Vested and expected to vest at March 31, 2025

    66,208     $ 69.47       4.57     $ 8,931  
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
   

Restricted Stock Units

   

Weighted Average
Grant Date
Fair Value

 

Outstanding at December 31, 2024

    80,827     $ 98.79  

Awarded

    48,816       261.64  

Shares vested

    (41,916 )     114.38  

Shares forfeited

    (1,396 )     135.94  

Outstanding at March 31, 2025

    86,331     $ 146.01