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Note 9 - Warrants (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

Number of

Warrants

  

Weighted

Average

Exercise Price

 

Exercisable at January 1, 2022

  602,392  $24.00 

Granted

  -   - 

Exercised

  -   - 

Exercisable at March 31, 2022

  602,392  $24.00 
  

Number of

Warrants

  

Weighted

Average

Exercise Price

 

Granted at March 17, 2021

  602,392  $24.00 

Exercised

  -   - 

Exercisable at March 31, 2021

  602,392  $24.00