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Note 1 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Weighted Average Number of Shares [Table Text Block]
  

2021

  

2020

  

2019

 

Basic

  3,277,062   3,270,996   3,270,878 

Diluted

  3,338,151   3,306,503   3,277,198