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Note 10 - Stock-based Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Nonvested Share Activity [Table Text Block]
      

Weighted-

 
      

Average

 
      

Grant-date

 
  

Shares

  

Fair Value

 
         
         

Nonvested at December 31, 2020

  119,281  $9.10 

Granted

  850,729  $11.31 

Forfeited or canceled

  -  $- 

Vested

  (335,763

)

 $10.84 
         

Nonvested at December 31, 2021

  634,247  $11.14 

Granted

  219,878  $2.22 

Forfeited or canceled

  -  $- 

Vested

  (310,501

)

 $8.75 
         

Nonvested at December 31, 2022

  543,624  $8.90