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Note 3 - Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
      

Weighted-

 
      

average

 
      

Grant Date Fair

 
  

Units

  

Value Per Unit

 
         

Nonvested at January 1, 2023

  63,646  $24.34 

Granted

  29,781   27.40 

Vested

  (8,003)  26.09 

Forfeited

  (15,205)  26.09 

Nonvested at March 31, 2023

  70,219  $25.29 
         

Expected to vest as of March 31, 2023

  66,416  $25.12