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Note 11 - Share-based Incentive Plan (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
  

Common Shares

  

Outstanding shares:

     

Balance at December 31, 2020

  126,190  

Granted

  274,496  

Forfeited

  (12,706)

 

Vested

   

 

Balance at March 31, 2021

  387,980