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Note 13 - Stock Compensation Plans (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
  

Six Months Ended

 
  

June 30, 2021

 
  

Shares

  Weighted Average Grant Date Fair Value 

Unvested, beginning of year

  15,858  $20.40 

Granted

  13,094   17.40 

Vested

  (8,073)  19.84 

Forfeited

      

Unvested, end of period

  20,879  $18.73