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Note 14 - Warrants (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   

2021

   

2020

 
   

Shares

   

Wtd. Avg. Exercise Price

   

Shares

   

Wtd. Avg. Exercise Price

 

Outstanding at beginning of year

    79,100     $ 4.75       3,959,005     $ 4.33  

Exercised

    (79,100 )     4.75       (3,879,905 )     4.33  

Outstanding and exercisable at end of year

    -     $ -       79,100     $ 4.75