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Note 7 - Stock Compensation Plans (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
  

Nine Months Ended

 
  

September 30, 2022

 
  

Shares

  Weighted Average Grant Date Fair Value 

Unvested, beginning of year

  30,781  $19.79 

Granted

  10,110   22.19 

Vested

  (11,643)  20.58 

Forfeited

      

Unvested, end of period

  29,248  $20.31