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Note 7 - Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Three Months Ended

 
  

March 31,

 
  

2022

  

2021

 

Basic weighted-average shares

  30,267,000   27,510,000 

Conversion of unsecured loan notes

      

Unexercised options and unvested RSUs

     227,000 

Diluted weighted-average shares

  30,267,000   27,737,000