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Note 8 - Share-based Compensation (Tables)
6 Months Ended
Jun. 30, 2022
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

 $2.81  $1.58  $1.46  $4.34 

Fair value higher range

 $2.86  $1.61  $1.49  $4.43 

Exercise price

 $4.72  $2.56  $2.33  $6.33 

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, 2021

  2,204,000  $4.41   7.1  $ 

Granted

            

Exercised

            

Expired

  (65,000)  1.10       

Outstanding as of June 30, 2022

  2,139,000  $4.37   6.8

 

 $ 

Options exercisable as of June 30, 2022

  1,242,000  $3.98   

6.8

  $ 
Schedule of Nonvested Share Activity [Table Text Block]
  

Number of options

  

Weighted average exercise price per share

  

Weighted average remaining contractual term (in years)

 

Unvested as of December 31, 2021

  897,000  $4.91   7.3 

Granted

         

Vested

         

Unvested as of June 30, 2022

  897,000  $4.91   6.8 
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, 2021

  3,111,321  $8.03 

Granted

  200,000  $1.89 

Vested and delivered

  (880,670) $3.85 

Withheld as treasury stock (1)

  (208,329) $4.56 

Vested not delivered (2)

  (17,206) $3.35 

Forfeited

  (330,116) $3.72 

Unvested as of June 30, 2022

  1,875,000  $10.53 
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three Months Ended June 30,

  

Six Months Ended June 30,

 
  

2022

  

2021

  

2022

  

2021

 

Sales and marketing

 $143  $209  $313  $372 

Product development

  98   233   258   501 

General and administrative

  622   759   1,280   1,559 

Share-based compensation expense

  863   1,201   1,851   2,432 

Capitalized in intangible assets

  24   30   51   71 

Total share-based compensation

 $887  $1,231  $1,902  $2,503