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Note 8 - Share-based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Issuance Date

 

February 1, 2019

  

December 20, 2019

  

March 1, 2020

  

March 1, 2021

 

Fair value lower range

 $16.86  $9.48  $8.76  $26.04 

Fair value higher range

 $17.16  $9.66  $8.94  $26.58 

Exercise price

 $28.32  $15.36  $13.98  $37.98 

Expected term (in years)

  1.0 - 1.3   1.0 - 1.6   1.0 - 1.5   1.0 - 1.3 

Expected volatility

  65%  70%  70%  80%

Dividend yield

  %  %  %  %

Risk-free rate

  2.61%  1.85%  1.05%  1.18%
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
  

Number of options

  

Weighted average exercise price per share

  

Weighted average remaining contractual term (in years)

  

Aggregate intrinsic value

 

Outstanding as of December 31, 2023

  302,333  $25.68   5.4  $ 

Granted

            

Exercised

            

Forfeited

            

Outstanding as of March 31, 2024

  302,333  $25.68   5.2

 

 $ 

Options exercisable as of March 31, 2024

  284,333  $24.91   

5.1

  $ 
Schedule of Nonvested Share Activity [Table Text Block]
  

Number of stock options

  

Weighted average exercise price per share

  

Weighted average remaining contractual term (in years)

 

Unvested as of December 31, 2023

  123,833  $29.72   5.4 

Granted

         

Forfeited

         

Vested

  (105,833)      

Unvested as of March 31, 2024

  18,000  $37.98   6.9 
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
  

Number of units

  

Weighted average grant-date fair value

 

Unvested as of December 31, 2023

  731,538  $25.95 

Granted

      

Vested and delivered

  (44,257)  22.57 

Withheld as treasury stock (1)

      

Vested not delivered (2)

  (211,505)  10.57 

Forfeited

  (26,104)  7.98 

Unvested as of March 31, 2024

  449,673   34.50 
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three Months Ended March 31,

 
  

2024

  

2023

 

Sales and marketing

 $84  $167 

Product development

  45   191 

General and administrative

  471   763 

Share-based compensation expense

  600   1,121 

Capitalized in intangible assets

  18   27 

Total share-based compensation

 $618  $1,148