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Note 3 - Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2022
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, 2022

  76,933  $23.01 

Granted

  25,414   24.80 

Vested

  (25,263)  20.95 

Forfeited

  (13,438)  - 

Nonvested at September 30, 2022

  63,646  $24.34 
         

Expected to vest as of September 30, 2022

  57,271  $24.27