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Note 13 - Stock Compensation Plans (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
  

Nine Months Ended

 
  

September 30, 2020

 
  

Shares

  Weighted Average Grant Date Fair Value 

Unvested, beginning of year

  10,393  $19.26 

Granted

  14,457   20.94 

Vested

  (8,992)  19.96 

Forfeited

      

Unvested, end of period

  15,858  $20.40