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Note 10 - Stock Based Compensation (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
  

Shares

  Weighted Average Grant Date Value Per Share 

Nonvested at December 31, 2022

  71,707  $33.39 

Granted

  32,554   36.50 

Vested

  (13,698)  36.84 

Forfeited

  (104)  35.24 

Nonvested at March 31, 2023

  90,459  $33.98